依据作者在文献[1]提出的公式和计算机模拟方法,研究了Ti-Mo,Ti-Nb,Ti-Mo-Si,Ti-V-Al和Ti-6246等10种二元、三元和实用Ti合金的β→α″马氏体相变的晶体学特征。理论计算结果表明;所研究的各种Ti合金的β→α″相变切变量在0.03070—0.09551之间,马氏体亚结构由内孪晶构成,大部分合金的α″马氏体内孪晶比值在1—4之间,部分合金β→α″相变的体积变化小于0.01.从晶体学上说,这些特征与热弹性马氏体相变类似。
In the light of the phenomenological theory, the crystallographic feature ofthe martensitic transformation in 10 binary and ternary Ti alloys including TiMo, Ti-Nb, Ti-Mo-Si, Ti-V-Al and Ti-6246 has been studied on the basis of the formulation and computer simulation given by the author in part Ⅰ of this article. The results indicate that the shear magnitude for the β→a″ transformation of these Ti alloys ranged from 0.03070 to 0.09551. The substructure of a″ martensite is made of the internal twins. The ratio of the twin thickness in a″ martensite of most Ti alloys is from 1 to 4. The volume change of β→a″ phase transformation in partial alloys is within 0.01. These features seem to identify the thermoelastic martensite transformation taking a crystallographic view.
参考文献
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