【摘要】 研究了添加Si对一种新型近β钛合金显微组织和硅化物析出行为的影响。结果表明：在凝固过程中粗大、连续的硅化物优先在晶界处析出，铸态合金β晶粒尺寸得到细化。在等温热压缩变形下发生了动态再结晶，且析出的硅化物能抑制再结晶晶粒的长大。热变形过程中的元素重新分布和位错积累促进硅化物的动态析出，从而导致硅化物在晶界处呈不连续分布。这项工作为研究硅化物动态析出对合金显微组织和塑性变形行为的影响提供了深入的见解。更多还原

【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.更多还原