NiTi合金中R相的结构

NiTi合金中R相的结构 THE STRUCTURE OF R PHASE IN A NiTi ALLOY 熊玉峰 first-author 冯继文 邹化民 王子孝 本文采用倾动晶体选区电子衍射及X射线衍射并结合理论计算,证实近等原子比NiTi合金中的R相为三角结构, 空间群为P 1 m;R相与B2相具有（001）R//（111）B 2 , < 010 > R// < 11 > B 2 取向关系;R相有四种变体,它们之间具有一定的孪晶关系。 In near equiatomic NiTi alloy, a set of selected area electron diffraction patterns, obtained by high-angle tilting experiments, have been used in association with theoretical calculations to demonstrate that the structure of R phase belongs to trigonal crystal system and the space group is P 31m . The orientation relations between R and B2 phases are（001） R //（111） B2 , < 010 > R// < 211 > B2 . Four variants With certain twinning relations can coexist in R phase. NiTi合金 马氏体相变 R相 NiTi alloy R phase martensitic transformation 国家自然科学基金(61672102) 1987-03-01 2021-04-01 3