钢铁钒钛2026，Vol.47Issue(2)：63-70,8.DOI:10.7513/j.issn.1004-7638.2026.02.008
热轧变形量对Ti551合金再结晶与织构演化的影响
The influence of hot rolling deformation on recrystallization and texture evolution of Ti551 alloy
摘要
Abstract
As a representative thermomechanical processing step,hot rolling can generate texture evolu-tion that is critical to the strength-ductility synergy of titanium alloys.Ti551 is a newly developed medi-um-strength,high-toughness alloy designed for deep-sea service;however,its texture-evolution behavi-or during rolling remains unclear.In this work,Ti551 as-forged billets were hot rolled at near β-transus temperature region(Tβ,950℃)with reductions from 5%to 50%.Electron backscatter diffraction(EBSD)was used to quantitatively analyze the fractions of low-angle grain boundaries(LAGBs),grain orientation spread(GOS)and the evolution of α{0001}texture.The results show that,taking the an-nealed condition(0 reduction)as the reference,when the cumulative reduction increases from 0 to 30%,the area fraction of recrystallized/strain-relieved regions decreases from～55%to～36%,and remains nearly unchanged as the reduction is further increased to 50%.In addition,hot rolling develops a basal texture,but its overall intensity decreases with increasing reduction(i.e.,the peak intensity drops and the texture becomes more diffuse).These finds indicate that under near Tβ condition,when the rolling direction is perpendicular to the dominant texture direction of the forged billet,a higher cumulative re-duction is more effective in weakening the basal texture and dispersing the orientation peaks.This can help select the final-pass reduction to obtain a basketweave microstructure with smaller orientation-cluster length scales and improved microstructural uniformity.关键词
Ti551/热轧/再结晶/织构Key words
Ti551/hot rolling/recrystallization/texture分类
矿业与冶金引用本文复制引用
王云峰,罗晋如,郭逸丰,王岳乾,岳俊英,伍进濠..热轧变形量对Ti551合金再结晶与织构演化的影响[J].钢铁钒钛,2026,47(2):63-70,8.基金项目
国家重点研发计划项目(2024YFB3714200) （2024YFB3714200）
国家自然科学基金(52171052). （52171052）
