铸造技术2026，Vol.47Issue(5)：547-556,10.DOI:10.16410/j.issn1000-8365.2026.5206
近β钛合金在β单相区热变形过程中的组织演变行为
Microstructure Evolution Behavior of Near-β Titanium Alloy During Hot Deformation in the β Single-phase Region
摘要
Abstract
Controlling the microstructure morphology after deformation in the β single-phase region is crucial for the service performance of near-β titanium alloys.The microstructural evolution of the TC18 titanium alloy after hot deformation in the β single-phase region was investigated.The results show that as the strain rate decreases,the fraction of low-angle grain boundaries(LAGBs)significantly decreases,the serrated β grain boundaries tend to straighten,and subgrains expand from grain boundary regions into grain interiors with noticeable coarsening.The grain orientation analysis reveals that with decreasing strain rate and increasing deformation,the volume fraction of the {001} texture significantly increases,whereas the {111} texture exhibits the opposite trend.This is attributed to the synergistic effect of preferential activation of the {112}<111>slip system and strain-induced grain boundary migration(SIBM).Additionally,lower strain rates lead to an increase in the dynamic recrystallization(DRX)fraction,with the DRX mechanism transitioning from discontinuous dynamic recrystallization(DDRX)to continuous dynamic recrystallization(CDRX),which also enhances the{001} recrystallization texture component.关键词
近β钛合金/热变形/组织演变/织构演变/动态再结晶Key words
near-β titanium alloy/hot deformation/microstructure evolution/texture evolution/dynamic recrystallization分类
矿业与冶金引用本文复制引用
涂俊哲,贾润晨,田淼,赵彦妮,王彦伟,曾卫东..近β钛合金在β单相区热变形过程中的组织演变行为[J].铸造技术,2026,47(5):547-556,10.基金项目
中航重机股份有限公司技术创新基金(ZJQT-2024-05) （ZJQT-2024-05）
西北工业大学凝固技术全国重点实验室基金(2025-BJ-03) （2025-BJ-03）
