The Microstructure and strength of a V-5Cr-5Ti alloy processed by high pressure torsion
The Microstructure and strength of a V-5Cr-5Ti alloy processed by high pressure torsion
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DOI：
10.1016/j.msea.2019.04.094
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发表时间：
2019-06-05
期刊：
影响因子：
6.4
通讯作者：
Ungar, Tamds
中科院分区：
文献类型：
--
作者：
Fan, Zhijian;Joni, Bertalan;Ungar, Tamds
通过X射线线形分析和显微硬度测试，研究了高压扭转加工的V-5Cr-5Ti合金的显微组织和强度。高压扭转已在 4 和 8 GPa 下施加，旋转次数为 0.25、0.5、1、2、4 和 8。高角分辨率衍射仪的X射线束专用于线轮廓分析，在样品上的足迹约为200μm x 1.5mm。衍射图样是在样品的中心、半半径处和靠近边缘处测量的。该技术提供了大量的微观结构和硬度数据，作为高达约 300 伽玛全等的应变的函数。使用泰勒方程将 X 射线线展宽确定的位错密度与合金的强度相关联并进行讨论。
The microstructure and the strength of high pressure torsion processed V-5Cr-5Ti alloy are investigated by X-ray line profile analysis and microhardness testing. High pressure torsion has been applied at 4 and 8 GPa with 0.25, 0.5, 1, 2, 4 and 8 rotations. The X-ray beam of the high angular resolution diffractometer, dedicated for line profile analysis, has a footprint of about 200 mu m x 1.5 mm on the specimen. The diffraction patterns have been measured in the center, at half radius and close to the edge of the specimens. This technique has provided a large number of data of the microstructure and hardness as a function of strain up to about gamma congruent to 300. The dislocation density determined by X-ray line broadening is correlated and discussed in terms of the strength of the alloy using the Taylor equation.