Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition
In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals u...
Ausführliche Beschreibung
Autor*in: |
Timofeeva, E.E. [verfasserIn] |
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Englisch |
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2022transfer abstract |
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Übergeordnetes Werk: |
Enthalten in: Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners - Jacobs, Jacquelyn A. ELSEVIER, 2017, JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics, Lausanne |
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Übergeordnetes Werk: |
volume:922 ; year:2022 ; day:20 ; month:11 ; pages:0 |
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DOI / URN: |
10.1016/j.jallcom.2022.166275 |
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ELV058564373 |
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245 | 1 | 0 | |a Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition |
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520 | |a In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). | ||
520 | |a In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). | ||
650 | 7 | |a Oriented martensite |2 Elsevier | |
650 | 7 | |a Martensitic transformations |2 Elsevier | |
650 | 7 | |a Self-accommodating structure |2 Elsevier | |
650 | 7 | |a Stress/strain measurements |2 Elsevier | |
650 | 7 | |a TiNi alloys |2 Elsevier | |
650 | 7 | |a Strain/temperature measurements |2 Elsevier | |
700 | 1 | |a Panchenko, E.Yu. |4 oth | |
700 | 1 | |a Zherdeva, M.V. |4 oth | |
700 | 1 | |a Eftifeeva, A.S. |4 oth | |
700 | 1 | |a Surikov, N.Yu. |4 oth | |
700 | 1 | |a Tagiltsev, A.I. |4 oth | |
700 | 1 | |a Fatkullin, I. |4 oth | |
700 | 1 | |a Tokhmetova, A. |4 oth | |
700 | 1 | |a Yanushonite, E.I. |4 oth | |
700 | 1 | |a Chumlyakov, Yu.I. |4 oth | |
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10.1016/j.jallcom.2022.166275 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV058564373 (ELSEVIER)S0925-8388(22)02666-4 DE-627 ger DE-627 rakwb eng 630 VZ Timofeeva, E.E. verfasserin aut Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). Oriented martensite Elsevier Martensitic transformations Elsevier Self-accommodating structure Elsevier Stress/strain measurements Elsevier TiNi alloys Elsevier Strain/temperature measurements Elsevier Panchenko, E.Yu. oth Zherdeva, M.V. oth Eftifeeva, A.S. oth Surikov, N.Yu. oth Tagiltsev, A.I. oth Fatkullin, I. oth Tokhmetova, A. oth Yanushonite, E.I. oth Chumlyakov, Yu.I. oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:922 year:2022 day:20 month:11 pages:0 https://doi.org/10.1016/j.jallcom.2022.166275 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 922 2022 20 1120 0 |
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10.1016/j.jallcom.2022.166275 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV058564373 (ELSEVIER)S0925-8388(22)02666-4 DE-627 ger DE-627 rakwb eng 630 VZ Timofeeva, E.E. verfasserin aut Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). Oriented martensite Elsevier Martensitic transformations Elsevier Self-accommodating structure Elsevier Stress/strain measurements Elsevier TiNi alloys Elsevier Strain/temperature measurements Elsevier Panchenko, E.Yu. oth Zherdeva, M.V. oth Eftifeeva, A.S. oth Surikov, N.Yu. oth Tagiltsev, A.I. oth Fatkullin, I. oth Tokhmetova, A. oth Yanushonite, E.I. oth Chumlyakov, Yu.I. oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:922 year:2022 day:20 month:11 pages:0 https://doi.org/10.1016/j.jallcom.2022.166275 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 922 2022 20 1120 0 |
allfields_unstemmed |
10.1016/j.jallcom.2022.166275 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV058564373 (ELSEVIER)S0925-8388(22)02666-4 DE-627 ger DE-627 rakwb eng 630 VZ Timofeeva, E.E. verfasserin aut Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). Oriented martensite Elsevier Martensitic transformations Elsevier Self-accommodating structure Elsevier Stress/strain measurements Elsevier TiNi alloys Elsevier Strain/temperature measurements Elsevier Panchenko, E.Yu. oth Zherdeva, M.V. oth Eftifeeva, A.S. oth Surikov, N.Yu. oth Tagiltsev, A.I. oth Fatkullin, I. oth Tokhmetova, A. oth Yanushonite, E.I. oth Chumlyakov, Yu.I. oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:922 year:2022 day:20 month:11 pages:0 https://doi.org/10.1016/j.jallcom.2022.166275 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 922 2022 20 1120 0 |
allfieldsGer |
10.1016/j.jallcom.2022.166275 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV058564373 (ELSEVIER)S0925-8388(22)02666-4 DE-627 ger DE-627 rakwb eng 630 VZ Timofeeva, E.E. verfasserin aut Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). Oriented martensite Elsevier Martensitic transformations Elsevier Self-accommodating structure Elsevier Stress/strain measurements Elsevier TiNi alloys Elsevier Strain/temperature measurements Elsevier Panchenko, E.Yu. oth Zherdeva, M.V. oth Eftifeeva, A.S. oth Surikov, N.Yu. oth Tagiltsev, A.I. oth Fatkullin, I. oth Tokhmetova, A. oth Yanushonite, E.I. oth Chumlyakov, Yu.I. oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:922 year:2022 day:20 month:11 pages:0 https://doi.org/10.1016/j.jallcom.2022.166275 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 922 2022 20 1120 0 |
allfieldsSound |
10.1016/j.jallcom.2022.166275 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV058564373 (ELSEVIER)S0925-8388(22)02666-4 DE-627 ger DE-627 rakwb eng 630 VZ Timofeeva, E.E. verfasserin aut Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). Oriented martensite Elsevier Martensitic transformations Elsevier Self-accommodating structure Elsevier Stress/strain measurements Elsevier TiNi alloys Elsevier Strain/temperature measurements Elsevier Panchenko, E.Yu. oth Zherdeva, M.V. oth Eftifeeva, A.S. oth Surikov, N.Yu. oth Tagiltsev, A.I. oth Fatkullin, I. oth Tokhmetova, A. oth Yanushonite, E.I. oth Chumlyakov, Yu.I. oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:922 year:2022 day:20 month:11 pages:0 https://doi.org/10.1016/j.jallcom.2022.166275 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 922 2022 20 1120 0 |
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Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition |
abstract |
In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). |
abstractGer |
In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). |
abstract_unstemmed |
In present work, we investigated the thermoelastic B2-B19' martensitic transformations in thermocycles under constant stress, σapp, (ε(Т) curves) and in loading/unloading cycles (σ(ε) curves) in quenched [001]-oriented single crystals of Ti-50.7 at%Ni and Ti-51.7 at%Ni alloys. Single crystals undergo either thermal-induced В2-В19' martensitic transformation (Ti-50.7 at%Ni) or strain glass transition (Ti-51.7 at%Ni), depending on their chemical composition. The transformation type defines the morphology of a martensite during cooling under stress. In Ti-50.7 at%Ni alloys during stress-assisted cooling the morphology is the mix of self-accommodation martensite and oriented martensite. In opposite, in Ti-51.7 at%Ni alloys the morphology consists of oriented martensite only. The following parameters in stress-assisted cooling/heating cycles are determined by transformation type and morphology of a martensite: the minimal stress, σmin, for oriented martensite formation; the coefficient dεfor/dσ that defines the strain dependence on stress, εfor(σapp), and the presence of additional stage in the dependence M s σ (σapp). Similar in loading/unloading cycles the transformation type defines the energy barrier that should be overcome in order to start the stress-induced martensitic transformation, and, so, the stress level, σcr( M s 0 ). |
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Shape memory effect in TiNi single crystals with thermal-induced martensite transformation or strain glass transition |
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