Li Zheng, Li Luo Yi, Zhu Ye Bin, Lin Kui, Ren Zhi Tian, Yang Yang, Liu Ying, Wang Jing Tao, Langdon Terence G
School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210014, China.
Materials Research Group, Department of Mechanical Engineering, University of Southampton, Southampton, SO17 1BJ, UK.
Sci Rep. 2022 Oct 25;12(1):17901. doi: 10.1038/s41598-022-21717-z.
A stable {[Formula: see text]} <110> single component sharp texture was obtained during ambient temperature tube High-Pressure Shearing (t-HPS) of 99.999% purity aluminum. It is shown that the grain size and the grain aspect ratio saturate at ~ 8 μm and ~ 1.6, respectively, at an equivalent strain of ~ 30 and the high-angle grain boundary fraction continues to decrease after this saturation even to equivalent strains exceeding ~ 200. The {[Formula: see text]} <110> texture emerges at an equivalent strain of ~ 6 to 9 with the completion of recrystallization and develops gradually as a sole component sharp texture with increasing intensity upon further processing. This component is a stable orientation in t-HPS processing although it was not previously observed experimentally as a shear texture. Thus, t-HPS processing provides a new and effective experimental tool for simple shear testing that is distinctly different from earlier shear strain methods such as torsional processing.
在对纯度为99.999%的铝进行室温管内高压剪切（t-HPS）过程中，获得了一种稳定的{[公式：见正文]}<110>单组分尖锐织构。结果表明，在等效应变为30时，晶粒尺寸和晶粒纵横比分别在8μm和1.6处达到饱和，并且在此饱和之后，即使等效应变超过200，高角度晶界分数仍继续下降。{[公式：见正文]}<110>织构在等效应变为~6至9时随着再结晶的完成而出现，并随着进一步加工强度增加逐渐发展成为唯一的单组分尖锐织构。该组分在t-HPS加工中是一种稳定取向，尽管以前在实验中未观察到它作为剪切织构。因此，t-HPS加工为简单剪切测试提供了一种全新且有效的实验工具，这与诸如扭转加工等早期剪切应变方法明显不同。
