Dynamic recrystallization and silicide precipitation behavior of titanium matrix composites under different strains

被引：0
作者：
ZHAO E.-T. [1 ]
SUN S.-C. [1 ]
YU J.-R. [1 ]
AN Y.-K. [1 ]
CHEN W.-Z. [2 ]
CHEN R.-R. [3 ]
机构：
[1] School of Mechanical Engineering, Shandong University of Technology, Zibo
[2] School of Materials Science and Engineering, Harbin Institute of Technology, Weihai
[3] National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin
来源：
Transactions of Nonferrous Metals Society of China (English Edition) | 2021年 / 31卷 / 11期
基金：
中国国家自然科学基金;
关键词：
dynamic recrystallization; hot compression; silicide precipitation; titanium matrix composites;
D O I：
10.1016/S1003-6326(21)65739-4
中图分类号：
学科分类号：
摘要：
In order to elucidate the microstructure evolution and silicide precipitation behavior during high-temperature deformation, TiB reinforced titanium matrix composites were subjected to isothermal hot compression at 950 °C, strain rate of 0.05 s−1 and employing different strains of 0.04, 0.40, 0.70 and 1.00. The results show that with the increase of strain, a decrease in the content, dynamic recrystallization of the α phase and the vertical distribution of TiB along the compression axis lead to stress stability. Meantime, continuous dynamic recrystallization reduces the orientation difference of the primary α phase, which weakens the texture strength of the matrix. The recrystallization mechanisms are strain-induced grain boundary migration and particle stimulated nucleation by TiB. The silicide of Ti6Si3 is mainly distributed at the interface of TiB and α phase. The precipitation of silicide is affected by element diffusion, and TiB whisker accelerates the precipitation behavior of silicide by hindering the movement of dislocations and providing nucleation particles. © 2021 The Nonferrous Metals Society of China
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页码：3416 / 3427
页数：11
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