Microstructural evolution associated with martensitic transformation in Ni-Mn-Ga alloy

17th International Conference on Textures of Materials

材料科学;物理学

Li, Z.^1 ; Zhang, Y.^2,3 ; Esling, C.^2,3 ; Zhao, X.^1 ; Zuo, L.^1

Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang

110819, China^1

LEM3, CNRS UMR 7239, Université de Lorraine, Metz

57045, France^2

Laboratory of Excellence on Design of Alloy Metals for Low-mAss Structures (DAMAS), Université de Lorraine, Metz

57045, France^3

关键词: Electron backscatter diffraction technique;    Intermartensitic transformations;    Martensite plates;    Ni-Mn-Ga alloys;    Polycrystalline;    Spatially resolved;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/82/1/012087/pdf
DOI  :  10.1088/1757-899X/82/1/012087

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Based on the spatially resolved electron backscatter diffraction technique, the microstructural evolution accompanying the martensitic transformation (austenite to 7M martensite) and the intermartensitic transformation (7M martensite to NM martensite) was studied on a polycrystalline Ni53Mn22Ga25 alloy. Results show that the 7M martensite plate groups transformed from initial austenite have a diamond-shape with four twin-related variants. The 7M to NM intermartensitic transformation was accompanied by the thickening of martensite plates. With the experimental results, the characteristics of microstructural evolution during the phase transformations were further analyzed.