中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 6 June 2025 |
（1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. Kocel Machinery Co., Ltd., Yinchuan 750021, China;
3. Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment, Ministry of Education, Taiyuan 030024, China;
4. Department of Chemical and Materials Engineering, University of Auckland, New Zealand）
Abstract:This study investigated the effect of Si addition on the microstructure and the silicide precipitation behavior in a novel near-β titanium alloy. The results show that coarse and continuous silicides were preferentially precipitated at the grain boundary during the solidification process, and the β grain size of the as-cast alloy was refined. Dynamic recrystallization occurs under isothermal compression, and the silicide could inhibit the growth of recrystallized grains. The element redistribution and dislocation accumulation during hot deformation promote the dynamic precipitation of silicide, resulting in a discontinuous distribution of silicides at the grain boundaries. This work provides insight into how silicide dynamic precipitation will affect the microstructure and plastic deformation behavior of metal alloys.
Key words: near-β titanium alloy; hot compression; silicide; grain refinement; dynamic precipitation
