Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints
The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zhang, Z. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2014transfer abstract |
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| Schlagwörter: |
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| Umfang: |
13 |
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| Übergeordnetes Werk: |
Enthalten in: Nonlinear relationship between monetary policy and stock returns: Evidence from the U.S. - Chauvet, Marcelle ELSEVIER, 2022, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:73 ; year:2014 ; pages:227-239 ; extent:13 |
| Links: |
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| DOI / URN: |
10.1016/j.actamat.2014.04.021 |
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ELV022994033 |
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| 245 | 1 | 0 | |a Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints |
| 264 | 1 | |c 2014transfer abstract | |
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| 520 | |a The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. | ||
| 520 | |a The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. | ||
| 650 | 7 | |a Friction stir welding |2 Elsevier | |
| 650 | 7 | |a Aging |2 Elsevier | |
| 650 | 7 | |a Mechanical properties |2 Elsevier | |
| 650 | 7 | |a Aluminum alloys |2 Elsevier | |
| 650 | 7 | |a Microstructure |2 Elsevier | |
| 700 | 1 | |a Xiao, B.L. |4 oth | |
| 700 | 1 | |a Ma, Z.Y. |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Chauvet, Marcelle ELSEVIER |t Nonlinear relationship between monetary policy and stock returns: Evidence from the U.S. |d 2022 |g Amsterdam [u.a.] |w (DE-627)ELV009239057 |
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| 856 | 4 | 0 | |u https://doi.org/10.1016/j.actamat.2014.04.021 |3 Volltext |
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10.1016/j.actamat.2014.04.021 doi GBVA2014019000010.pica (DE-627)ELV022994033 (ELSEVIER)S1359-6454(14)00260-2 DE-627 ger DE-627 rakwb eng 670 670 DE-600 330 VZ Zhang, Z. verfasserin aut Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints 2014transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. Friction stir welding Elsevier Aging Elsevier Mechanical properties Elsevier Aluminum alloys Elsevier Microstructure Elsevier Xiao, B.L. oth Ma, Z.Y. oth Enthalten in Elsevier Science Chauvet, Marcelle ELSEVIER Nonlinear relationship between monetary policy and stock returns: Evidence from the U.S. 2022 Amsterdam [u.a.] (DE-627)ELV009239057 volume:73 year:2014 pages:227-239 extent:13 https://doi.org/10.1016/j.actamat.2014.04.021 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 73 2014 227-239 13 045F 670 |
| spelling |
10.1016/j.actamat.2014.04.021 doi GBVA2014019000010.pica (DE-627)ELV022994033 (ELSEVIER)S1359-6454(14)00260-2 DE-627 ger DE-627 rakwb eng 670 670 DE-600 330 VZ Zhang, Z. verfasserin aut Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints 2014transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. Friction stir welding Elsevier Aging Elsevier Mechanical properties Elsevier Aluminum alloys Elsevier Microstructure Elsevier Xiao, B.L. oth Ma, Z.Y. oth Enthalten in Elsevier Science Chauvet, Marcelle ELSEVIER Nonlinear relationship between monetary policy and stock returns: Evidence from the U.S. 2022 Amsterdam [u.a.] (DE-627)ELV009239057 volume:73 year:2014 pages:227-239 extent:13 https://doi.org/10.1016/j.actamat.2014.04.021 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 73 2014 227-239 13 045F 670 |
| allfields_unstemmed |
10.1016/j.actamat.2014.04.021 doi GBVA2014019000010.pica (DE-627)ELV022994033 (ELSEVIER)S1359-6454(14)00260-2 DE-627 ger DE-627 rakwb eng 670 670 DE-600 330 VZ Zhang, Z. verfasserin aut Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints 2014transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. Friction stir welding Elsevier Aging Elsevier Mechanical properties Elsevier Aluminum alloys Elsevier Microstructure Elsevier Xiao, B.L. oth Ma, Z.Y. oth Enthalten in Elsevier Science Chauvet, Marcelle ELSEVIER Nonlinear relationship between monetary policy and stock returns: Evidence from the U.S. 2022 Amsterdam [u.a.] (DE-627)ELV009239057 volume:73 year:2014 pages:227-239 extent:13 https://doi.org/10.1016/j.actamat.2014.04.021 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 73 2014 227-239 13 045F 670 |
| allfieldsGer |
10.1016/j.actamat.2014.04.021 doi GBVA2014019000010.pica (DE-627)ELV022994033 (ELSEVIER)S1359-6454(14)00260-2 DE-627 ger DE-627 rakwb eng 670 670 DE-600 330 VZ Zhang, Z. verfasserin aut Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints 2014transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. Friction stir welding Elsevier Aging Elsevier Mechanical properties Elsevier Aluminum alloys Elsevier Microstructure Elsevier Xiao, B.L. oth Ma, Z.Y. oth Enthalten in Elsevier Science Chauvet, Marcelle ELSEVIER Nonlinear relationship between monetary policy and stock returns: Evidence from the U.S. 2022 Amsterdam [u.a.] (DE-627)ELV009239057 volume:73 year:2014 pages:227-239 extent:13 https://doi.org/10.1016/j.actamat.2014.04.021 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 73 2014 227-239 13 045F 670 |
| allfieldsSound |
10.1016/j.actamat.2014.04.021 doi GBVA2014019000010.pica (DE-627)ELV022994033 (ELSEVIER)S1359-6454(14)00260-2 DE-627 ger DE-627 rakwb eng 670 670 DE-600 330 VZ Zhang, Z. verfasserin aut Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints 2014transfer abstract 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. Friction stir welding Elsevier Aging Elsevier Mechanical properties Elsevier Aluminum alloys Elsevier Microstructure Elsevier Xiao, B.L. oth Ma, Z.Y. oth Enthalten in Elsevier Science Chauvet, Marcelle ELSEVIER Nonlinear relationship between monetary policy and stock returns: Evidence from the U.S. 2022 Amsterdam [u.a.] (DE-627)ELV009239057 volume:73 year:2014 pages:227-239 extent:13 https://doi.org/10.1016/j.actamat.2014.04.021 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 73 2014 227-239 13 045F 670 |
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FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. 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With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. 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Zhang, Z. ddc 670 ddc 330 Elsevier Friction stir welding Elsevier Aging Elsevier Mechanical properties Elsevier Aluminum alloys Elsevier Microstructure Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints |
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hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024al–t351 joints |
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Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024Al–T351 joints |
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The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. |
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The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. |
| abstract_unstemmed |
The microstructural evolution in the heat-affected zone (HAZ) of 5mm thick friction stir welded (FSW) 2024Al–T351 joints during long-term natural aging and its effect on mechanical properties were investigated by a combination of transmission electron microscopy, atom probe tomography, differential scanning calorimetry and mechanical property tests. FSW thermal cycle resulted in two low hardness zones (LHZs) in the HAZ: LHZ I, near the nugget zone (NZ), with grain coarsening and the dissolution of Guinier–Preston–Bagaryatsky (GPB) zones and solute clusters, as well as the formation and coarsening of S (Al2CuMg) phases; and LHZ II, far from the NZ, with the dissolution of GPB zones and solute clusters. After 4–12months of natural aging, the hardness recovered in the LHZ II due to the increase in number densities of Cu–Mg, Cu and Mg clusters, while there was no obvious change in the microstructure and hardness in LHZ I. The tensile strength of FSW 2024Al–T351 joints increased as the welding speed increased from 100 to 400mmmin−1 and was weakly enhanced by the long-term natural aging, but was independent of the rotation rates from 400 to 1200rpm. The FSW joints fractured along LHZ I under a low welding speed of 100mmmin−1. With the increase of the welding speed and the prolongation of natural aging time, the joints fractured at LHZ I, LHZ II or the interface of the NZ/thermo-mechanically affected zone. The variation in the fracture locations was rationalized based on the microstructural evolution. |
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