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题名: Microtexture and Nanoindentation of alpha and beta Phases in Ti-6Al-1.5Cr-2.5Mo-0.5Fe-0.3Si Titanium Alloy
作者: Lei, Xiaofei;  Dong, Limin;  Zhang, Zhiqiang;  Hu, Ming;  Wang, Zhongchang;  Hao, Yulin;  Yang, Rui
发表日期: 2017-9-1
摘要: Microstructure and nanoindentation of two-phase Ti-6Al-1.5Cr-2.5Mo-0.5Fe-0.3Si titanium alloy fabricated by drawing and subsequent annealing are systematically investigated. We find a strong fiber texture for alpha phase formed during drawing, which is characterized by crystallographic direction of < 01 (1) over bar0 > parallel to the drawing direction, yet a weak texture for beta phase, which is mainly consisted of < 112 > and < 102 > aligned with the drawing direction. The major texture components for the both phases during recrystallization are similar to those of the drawn state, but the corresponding texture intensities increase. A large number of alpha grains maintain the Burgers relationship with the beta grains for the drawn and annealed states. In the case of the annealed specimen, the mean values of hardness and elastic modulus for alpha phase are found to be 5.79 GPa and 165.22 GPa, respectively, yet are 4.73 GPa and 152.06 GPa, respectively, for the beta phase. Moreover, we also discuss the relation between elemental distribution and nanoindentation for individual phases. The hardness of textured alpha grains undergoes significant change as a function of the crystal orientation, in good agreement with the Schmid factor analysis. In contrast to the hardness, the measured elastic modulus values of alpha phase are less sensitive to the crystal orientation. No obvious change is identified for hardness and elastic modulus for beta grains in that all the beta grains are prone to generate slips.
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Recommended Citation:
Lei, Xiaofei,Dong, Limin,Zhang, Zhiqiang,et al. Microtexture And Nanoindentation Of Alpha And Beta Phases In Ti-6al-1.5cr-2.5mo-0.5fe-0.3si Titanium Alloy[J]. Amer Scientific Publishers,2017,9(9):1476-1483.

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