Scholarlink

<p>The stacking fault energy (SFE)-governed synergy between twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) mechanisms delivers superior mechanical properties compared to either effect alone. However, precise knowledge of an optimal TWIP and TRIP balance remains elusive and holistic understanding on the contributions from both TWIP and TRIP effects to the mechanical properties is still lacking. In this study, we show that by carefully tailoring the SFE to approximately 10 mJ·m<sup>−2</sup> through adjustment of grain size and deformation temperatures, an optimal synergy between strength and ductility can be achieved in Fe–Cr–Ni austenitic steels with a variety of compositions. This synergy arises from the intricate manipulation of the sustained TWIP and TRIP effects. The optimal combination characterized by approximately 18% deformation twins and 50% strain-induced martensite is revealed by an SFE-dependent physical model which models the austenite → twin → α′-martensite transformation sequence. These findings offer valuable insights for the fast and cost-effective design of austenitic steels.</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

Synergizing TWIP and TRIP effects for optimized mechanical performance via stacking fault energy control in austenitic steels

  • 期刊论文

  • 发表日期：

    2025年9月15日

查看全文
  • Jiahua Yuan,
  • Lingyu Wang,
  • Chenchong Wang,
  • Guangqi Dong,
  • Jinliang Wang,
  • Yizhuang Li,
  • Jun Hu,
  • Wei Xu

摘要

The stacking fault energy (SFE)-governed synergy between twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) mechanisms delivers superior mechanical properties compared to either effect alone. However, precise knowledge of an optimal TWIP and TRIP balance remains elusive and holistic understanding on the contributions from both TWIP and TRIP effects to the mechanical properties is still lacking. In this study, we show that by carefully tailoring the SFE to approximately 10 mJ·m−2 through adjustment of grain size and deformation temperatures, an optimal synergy between strength and ductility can be achieved in Fe–Cr–Ni austenitic steels with a variety of compositions. This synergy arises from the intricate manipulation of the sustained TWIP and TRIP effects. The optimal combination characterized by approximately 18% deformation twins and 50% strain-induced martensite is revealed by an SFE-dependent physical model which models the austenite → twin → α′-martensite transformation sequence. These findings offer valuable insights for the fast and cost-effective design of austenitic steels.