Stress-induced detwinning and martensite transformation in an austenite Ni–Mn–Ga alloy with martensite cluster under uniaxial loading
Stress-induced martensitic detwinning and martensitic transformation during step-wise compression in an austenite Ni–Mn–Ga matrix with a martensite cluster under uniaxial loading have been investigated by electron backscatter diffraction, focusing on the crystallographic features of microstructure e...
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| Format: | Article |
| Language: | English |
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International Union of Crystallography
2019-05-01
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| Series: | IUCrJ |
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| Online Access: | http://scripts.iucr.org/cgi-bin/paper?S2052252519003208 |
| _version_ | 1819124939947507712 |
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| author | Long Hou Ying Niu Yanchao Dai Lansong Ba Yves Fautrelle Zongbin Li Bo Yang Claude Esling Xi Li |
| author_facet | Long Hou Ying Niu Yanchao Dai Lansong Ba Yves Fautrelle Zongbin Li Bo Yang Claude Esling Xi Li |
| author_sort | Long Hou |
| collection | DOAJ |
| description | Stress-induced martensitic detwinning and martensitic transformation during step-wise compression in an austenite Ni–Mn–Ga matrix with a martensite cluster under uniaxial loading have been investigated by electron backscatter diffraction, focusing on the crystallographic features of microstructure evolution. The results indicate that detwinning occurs on twins with a high Schmid factor for both intra-plate and inter-plate twins in the hierarchical structure, resulting in a nonmodulated (NM) martensite composed only of favourable variants with [001]NM orientation away from the compression axis. Moreover, the stress-induced martensitic transformation occurs at higher stress levels, undergoing a three-stage transformation from austenite to a twin variant pair and finally to a single variant with increasing compressive stress, and theoretical calculation shows that the corresponding crystallographic configuration is accommodated to the compression stress. The present research not only provides a comprehensive understanding of martensitic variant detwinning and martensitic transformation under compression stress, but also offers important guidelines for the mechanical training process of martensite. |
| first_indexed | 2024-12-22T07:32:13Z |
| format | Article |
| id | doaj.art-4674384711bd4e46ba6f650441673f3a |
| institution | Directory Open Access Journal |
| issn | 2052-2525 |
| language | English |
| last_indexed | 2024-12-22T07:32:13Z |
| publishDate | 2019-05-01 |
| publisher | International Union of Crystallography |
| record_format | Article |
| series | IUCrJ |
| spelling | doaj.art-4674384711bd4e46ba6f650441673f3a2022-12-21T18:33:58ZengInternational Union of CrystallographyIUCrJ2052-25252019-05-016336637210.1107/S2052252519003208lc5102Stress-induced detwinning and martensite transformation in an austenite Ni–Mn–Ga alloy with martensite cluster under uniaxial loadingLong Hou0Ying Niu1Yanchao Dai2Lansong Ba3Yves Fautrelle4Zongbin Li5Bo Yang6Claude Esling7Xi Li8State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, People's Republic of ChinaState Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, People's Republic of ChinaState Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, People's Republic of ChinaState Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, People's Republic of ChinaEPM-Madylam, ENSHMG BP 38402, St Martin d'Heres cedex, FranceKey Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110819, People's Republic of ChinaKey Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110819, People's Republic of ChinaLaboratoire d'Étude des Microstructures et de Mécanique des Matériaux (LEM3), CNRS UMR 7239, Université de Lorraine, Metz 57045, FranceState Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, People's Republic of ChinaStress-induced martensitic detwinning and martensitic transformation during step-wise compression in an austenite Ni–Mn–Ga matrix with a martensite cluster under uniaxial loading have been investigated by electron backscatter diffraction, focusing on the crystallographic features of microstructure evolution. The results indicate that detwinning occurs on twins with a high Schmid factor for both intra-plate and inter-plate twins in the hierarchical structure, resulting in a nonmodulated (NM) martensite composed only of favourable variants with [001]NM orientation away from the compression axis. Moreover, the stress-induced martensitic transformation occurs at higher stress levels, undergoing a three-stage transformation from austenite to a twin variant pair and finally to a single variant with increasing compressive stress, and theoretical calculation shows that the corresponding crystallographic configuration is accommodated to the compression stress. The present research not only provides a comprehensive understanding of martensitic variant detwinning and martensitic transformation under compression stress, but also offers important guidelines for the mechanical training process of martensite.http://scripts.iucr.org/cgi-bin/paper?S2052252519003208magnetic shape-memory alloys (MSMAs)electron backscatter diffraction (EBSD)detwinningmartensitic transformation |
| spellingShingle | Long Hou Ying Niu Yanchao Dai Lansong Ba Yves Fautrelle Zongbin Li Bo Yang Claude Esling Xi Li Stress-induced detwinning and martensite transformation in an austenite Ni–Mn–Ga alloy with martensite cluster under uniaxial loading IUCrJ magnetic shape-memory alloys (MSMAs) electron backscatter diffraction (EBSD) detwinning martensitic transformation |
| title | Stress-induced detwinning and martensite transformation in an austenite Ni–Mn–Ga alloy with martensite cluster under uniaxial loading |
| title_full | Stress-induced detwinning and martensite transformation in an austenite Ni–Mn–Ga alloy with martensite cluster under uniaxial loading |
| title_fullStr | Stress-induced detwinning and martensite transformation in an austenite Ni–Mn–Ga alloy with martensite cluster under uniaxial loading |
| title_full_unstemmed | Stress-induced detwinning and martensite transformation in an austenite Ni–Mn–Ga alloy with martensite cluster under uniaxial loading |
| title_short | Stress-induced detwinning and martensite transformation in an austenite Ni–Mn–Ga alloy with martensite cluster under uniaxial loading |
| title_sort | stress induced detwinning and martensite transformation in an austenite ni mn ga alloy with martensite cluster under uniaxial loading |
| topic | magnetic shape-memory alloys (MSMAs) electron backscatter diffraction (EBSD) detwinning martensitic transformation |
| url | http://scripts.iucr.org/cgi-bin/paper?S2052252519003208 |
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