Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments
Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional m...
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| Autor*in: |
Štrekelj, Neva [verfasserIn] |
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| Format: |
Artikel |
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| Erschienen: |
2015 |
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| Anmerkung: |
© 2015, Carl Hanser Verlag, München |
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| Übergeordnetes Werk: |
Enthalten in: Zeitschrift für Metallkunde - De Gruyter, 1919, 106(2015), 4 vom: 14. Apr., Seite 342-351 |
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| Übergeordnetes Werk: |
volume:106 ; year:2015 ; number:4 ; day:14 ; month:04 ; pages:342-351 |
| Links: |
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| DOI / URN: |
10.3139/146.111195 |
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| Katalog-ID: |
OLC2142038115 |
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| 520 | |a Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. | ||
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10.3139/146.111195 doi (DE-627)OLC2142038115 (DE-B1597)146.111195-p DE-627 ger DE-627 rakwb 660 620 670 VZ 670 VZ Štrekelj, Neva verfasserin aut Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2015, Carl Hanser Verlag, München Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. Naglič, Iztok aut Klančnik, Grega aut Nagode, Aleš aut Markoli, Boštjan aut Enthalten in Zeitschrift für Metallkunde De Gruyter, 1919 106(2015), 4 vom: 14. Apr., Seite 342-351 (DE-627)12947424X (DE-600)203021-4 (DE-576)014852101 0044-3093 nnns volume:106 year:2015 number:4 day:14 month:04 pages:342-351 https://doi.org/10.3139/146.111195 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_32 GBV_ILN_40 GBV_ILN_2048 AR 106 2015 4 14 04 342-351 |
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10.3139/146.111195 doi (DE-627)OLC2142038115 (DE-B1597)146.111195-p DE-627 ger DE-627 rakwb 660 620 670 VZ 670 VZ Štrekelj, Neva verfasserin aut Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2015, Carl Hanser Verlag, München Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. Naglič, Iztok aut Klančnik, Grega aut Nagode, Aleš aut Markoli, Boštjan aut Enthalten in Zeitschrift für Metallkunde De Gruyter, 1919 106(2015), 4 vom: 14. Apr., Seite 342-351 (DE-627)12947424X (DE-600)203021-4 (DE-576)014852101 0044-3093 nnns volume:106 year:2015 number:4 day:14 month:04 pages:342-351 https://doi.org/10.3139/146.111195 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_32 GBV_ILN_40 GBV_ILN_2048 AR 106 2015 4 14 04 342-351 |
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10.3139/146.111195 doi (DE-627)OLC2142038115 (DE-B1597)146.111195-p DE-627 ger DE-627 rakwb 660 620 670 VZ 670 VZ Štrekelj, Neva verfasserin aut Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2015, Carl Hanser Verlag, München Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. Naglič, Iztok aut Klančnik, Grega aut Nagode, Aleš aut Markoli, Boštjan aut Enthalten in Zeitschrift für Metallkunde De Gruyter, 1919 106(2015), 4 vom: 14. Apr., Seite 342-351 (DE-627)12947424X (DE-600)203021-4 (DE-576)014852101 0044-3093 nnns volume:106 year:2015 number:4 day:14 month:04 pages:342-351 https://doi.org/10.3139/146.111195 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_32 GBV_ILN_40 GBV_ILN_2048 AR 106 2015 4 14 04 342-351 |
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10.3139/146.111195 doi (DE-627)OLC2142038115 (DE-B1597)146.111195-p DE-627 ger DE-627 rakwb 660 620 670 VZ 670 VZ Štrekelj, Neva verfasserin aut Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2015, Carl Hanser Verlag, München Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. Naglič, Iztok aut Klančnik, Grega aut Nagode, Aleš aut Markoli, Boštjan aut Enthalten in Zeitschrift für Metallkunde De Gruyter, 1919 106(2015), 4 vom: 14. Apr., Seite 342-351 (DE-627)12947424X (DE-600)203021-4 (DE-576)014852101 0044-3093 nnns volume:106 year:2015 number:4 day:14 month:04 pages:342-351 https://doi.org/10.3139/146.111195 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_32 GBV_ILN_40 GBV_ILN_2048 AR 106 2015 4 14 04 342-351 |
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10.3139/146.111195 doi (DE-627)OLC2142038115 (DE-B1597)146.111195-p DE-627 ger DE-627 rakwb 660 620 670 VZ 670 VZ Štrekelj, Neva verfasserin aut Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2015, Carl Hanser Verlag, München Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. Naglič, Iztok aut Klančnik, Grega aut Nagode, Aleš aut Markoli, Boštjan aut Enthalten in Zeitschrift für Metallkunde De Gruyter, 1919 106(2015), 4 vom: 14. Apr., Seite 342-351 (DE-627)12947424X (DE-600)203021-4 (DE-576)014852101 0044-3093 nnns volume:106 year:2015 number:4 day:14 month:04 pages:342-351 https://doi.org/10.3139/146.111195 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_32 GBV_ILN_40 GBV_ILN_2048 AR 106 2015 4 14 04 342-351 |
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Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments |
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Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments |
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Štrekelj, Neva |
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Zeitschrift für Metallkunde |
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2015 |
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Štrekelj, Neva Naglič, Iztok Klančnik, Grega Nagode, Aleš Markoli, Boštjan |
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Štrekelj, Neva |
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10.3139/146.111195 |
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660 620 670 |
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microstructural changes in quasicrystalline al–mn–be–cu alloy after various heat treatments |
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Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments |
| abstract |
Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. © 2015, Carl Hanser Verlag, München |
| abstractGer |
Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. © 2015, Carl Hanser Verlag, München |
| abstract_unstemmed |
Abstract In this study we investigated the microstructural changes after a variety of heat treatments of the quasicrystalline Al–Mn–Be–Cu alloy. In addition, we report on Vickers microhardness measurements and tensile-test results for the same materials. The samples were produced in a conventional manner, i. e., melting in an electrical resistance furnace in air and a gravitational casting process using a round copper die, which was in the form of a tensile-test specimen with a diameter of 5 mm. After the casting, some of the samples were just solution treated (annealed) and then quenched in water, while others were additionally aged (artificially – T6, or naturally – T4) or directly aged after the casting. In comparison to the as-cast state, the Vickers microhardness values of the aluminum-based matrix and the tensile properties of the samples decreased when just the solution treatment, T4 or T6 treatment was performed. The tensile properties also decreased after the heat treatments. A microstructural inspection revealed that the microstructural changes occurred already during the solution treatment, i. e., the formation of the phases $ Be_{4} $Al(Mn, Cu) and $ τ_{1} $-$ Al_{29} $$ Mn_{6} $$ Cu_{4} $ on the approximant H-$ Al_{4} $Mn and quasicrystalline i-phase particles' edges and the occurrence of precipitates in the $ α_{Al} $ matrix. The precipitates that would additionally contribute to the hardening of the alloy did not form. The directly aged samples showed little or no increase in microhardness values in comparison to the as-cast samples, but possibilities of θ″ precipitates being formed from the already saturated matrix after the casting could not be excluded. After all the heat treatments the quasicrystalline i-phase, as a primary and eutectic phase, was preserved. © 2015, Carl Hanser Verlag, München |
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Microstructural changes in quasicrystalline Al–Mn–Be–Cu alloy after various heat treatments |
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Naglič, Iztok Klančnik, Grega Nagode, Aleš Markoli, Boštjan |
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