Quasi-static and dynamic forced shear deformation behaviors of Ti-5Mo-5V-8Cr-3Al alloy
发布时间：2021-10-21
点击次数：
DOI码：10.1016/j.msea.2017.03.005
发表刊物：Materials Science and Engineering A
关键字：Ti-5Mo-5V-8Cr-3Al alloy; Forced shear deformation; Adiabatic shear band; Microtexture; Hardness
摘要：The mechanical behavior and microstructure characteristics of Ti-5Mo-5V-8Cr-3Al alloy were investigated with hat-shaped samples compressed under quasi-static and dynamic loading. Compared with the quasi-static loading, a higher shear stress peak and a shear instability stage were observed during the dynamic shear response. The results showed that an adiabatic shear band consisting of ultrafine equiaxed grains was only developed in the dynamic specimen, while a wider shear region was formed in the quasi-static specimen. The microhardness measurements revealed that shear region in the quasi-static specimen and adiabatic shear band in the dynamic specimen exhibited higher hardness than that of adjacent regions due to the strain hardening and grain refining, respectively. A stable orientation, in which the crystallographic {110} planes and <111> directions were respectively parallel to the shear plane and shear direction, developed in both specimens. And the microtexture of the adiabatic shear band was more well-defined than that of the shear region in the quasi-static specimen. Rotational dynamic recrystallization mechanism was suggested to explain the formation of ultrafine equiaxed grains within the adiabatic shear band by thermodynamic and kinetic calculations.
合写作者：Z.Y. Chen*, C.K. Zhan, L.J. Kuang, J.B. Shao, R.K. Wang, C.M. Liu
第一作者：Z.M. Wang
论文类型：期刊论文
文献类型：J
卷号：691
页面范围：51-59
ISSN号：0921-5093
是否译文：否
发表时间：2017-04-13