Scholarlink

<p>It has long been a huge challenge to simultaneously optimize the strength and plasticity of near-α TA18 titanium (Ti) alloy prepared by traditional rolling deformation processes. In this study, the TA18 Ti alloy sheet that integrates fine grains and high-density deformation twins (DT) was prepared by a short-process technique combining hot rolling in the β-single-phase region and cryogenic-temperature rolling (CTR). Notably, this method enables the TA18 Ti alloy to achieve excellent strength–ductility synergy. The alloy exhibits the ultimate tensile strength (UTS) of ~ 1005&#xa0;MPa, the yield strength (YS) of ~ 921&#xa0;MPa, and the elongation of ~ 15%. The high strength is mainly caused by the combined effects of obvious grain refinement strengthening in the fine-grained (FG) region and the presence of dislocations after CTR. Meanwhile, the combined effect of twin boundary strengthening caused by the interaction of deformation twins (DTs) and dislocations also causes an increase in strength. In addition, stacking faults within twins are activated during plastic deformation, which significantly improves the ductility of the material and endows the TA18 Ti alloy with excellent ductility. The results of our study provide an effective way for developing Ti alloys with excellent strength–ductility synergy by introducing fine grains and high-density deformation twins.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The Effect of Cryogenic-Temperature Rolling on the Microstructure and Mechanical Properties of TA18 Titanium Alloy

  • 期刊论文

  • 发表日期：

    2025年6月20日

查看全文
  • Yiwen Yan,
  • Pei Liu,
  • Zhiyong Zhang,
  • Aiqin Wang,
  • Zhizhi Wang,
  • Xuekun Wei,
  • Jingpei Xie

摘要

It has long been a huge challenge to simultaneously optimize the strength and plasticity of near-α TA18 titanium (Ti) alloy prepared by traditional rolling deformation processes. In this study, the TA18 Ti alloy sheet that integrates fine grains and high-density deformation twins (DT) was prepared by a short-process technique combining hot rolling in the β-single-phase region and cryogenic-temperature rolling (CTR). Notably, this method enables the TA18 Ti alloy to achieve excellent strength–ductility synergy. The alloy exhibits the ultimate tensile strength (UTS) of ~ 1005 MPa, the yield strength (YS) of ~ 921 MPa, and the elongation of ~ 15%. The high strength is mainly caused by the combined effects of obvious grain refinement strengthening in the fine-grained (FG) region and the presence of dislocations after CTR. Meanwhile, the combined effect of twin boundary strengthening caused by the interaction of deformation twins (DTs) and dislocations also causes an increase in strength. In addition, stacking faults within twins are activated during plastic deformation, which significantly improves the ductility of the material and endows the TA18 Ti alloy with excellent ductility. The results of our study provide an effective way for developing Ti alloys with excellent strength–ductility synergy by introducing fine grains and high-density deformation twins.