Internal Defects of B19’ Martensite via R-Phase in Ti-Ni-Fe and Thermally Cycled Ti-Ni Alloys
Internal Defects of B19’ Martensite via R-Phase in Ti-Ni-Fe and Thermally Cycled Ti-Ni Alloys
复制标题
Ti-Ni-Fe 和热循环 Ti-Ni 合金中 R 相 B19’ 马氏体的内部缺陷
DOI：
10.2320/matertrans.mer2008430
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发表时间：
2009
影响因子：
1.2
通讯作者：
M. Nishida
中科院分区：
文献类型：
--
作者：
T. Nishiura;M. Nishida
用X射线衍射仪和透射电子显微镜研究了Ti-Ni-Fe合金中R相变后的B19‘马氏体的晶体结构和形态。固溶处理的Ti-Ni-Fe合金中的B19‘马氏体相与固溶处理的二元Ti-Ni合金中的B19’马氏体组织相同。在热循环Ti-Ni-Fe合金中，经常观察到的(001)B19‘复合孪晶与热循环二元Ti-Ni合金中的相同。认为(001)B19‘复合孪晶是一种减少热循环中位错引起的内应力的形变孪晶，而不是R到B19’相变的晶格不变剪切。[DOI：10.2320/MATERTRA.MER2008430]
Crystallography and morphology of B19’ martensite via R phase transformation in Ti-Ni-Fe alloy have been investigated by X-ray diffraction and transmission electron microscopy. The microstructure aspects of the B19’ martensite in the solution treated Ti-Ni-Fe alloy was the same as those in the solution treated binary Ti-Ni alloy. In the thermal cycled Ti-Ni-Fe alloy, the (001)B19’ compound twins frequently observed were the same as those in the thermal cycled binary Ti-Ni alloy. It is considered that the (001)B19’ compound twin was a kind of deformation twin to reduce the internal stress due to dislocations introduced during the thermal cycle, rather than a lattice invariant shear of the R to B19’ transformation. [doi:10.2320/matertrans.MER2008430]