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<p>Cold-deformed austenitic stainless steels usually sacrifice deformability for high strength. A short-time annealing at 600&#xa0;°C for 2&#xa0;min was conducted on cold-rolled 301 stainless steel, which dramatically improved its local deformability by 270% (from 7.61% to 28%) while maintaining the ultra-high strength level of 2&#xa0;GPa. Microstructural observation revealed 11.7% reversed austenite formation and a reduction in martensite dislocation density (1.31 × 10<sup>16</sup> to 5.5 × 10<sup>15</sup>&#xa0;m<sup>−2</sup>) without recrystallization. The enhanced local deformability is attributed to the synergistic interplay of two key mechanisms: (1) enhanced work-hardening capability due to the formation of martensite produced by cold rolling tempering and (2) the transformation-induced plasticity effect of the reversed austenite, which effectively coordinates localized deformation and suppresses crack nucleation.</p>

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Enhanced local deformability in ultra-high strength stainless steel via a short-time annealing

  • 期刊论文

  • 发表日期：

    2026年6月2日

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  • Shuo-Yan Chang,
  • Wen-Qi Mao,
  • Yan-Kang Zhao,
  • Shuang-Zong Luo,
  • Ming Chen,
  • Shuai Ma,
  • Li-Jia Zhao,
  • Qiang Wang

摘要

Cold-deformed austenitic stainless steels usually sacrifice deformability for high strength. A short-time annealing at 600 °C for 2 min was conducted on cold-rolled 301 stainless steel, which dramatically improved its local deformability by 270% (from 7.61% to 28%) while maintaining the ultra-high strength level of 2 GPa. Microstructural observation revealed 11.7% reversed austenite formation and a reduction in martensite dislocation density (1.31 × 1016 to 5.5 × 1015 m−2) without recrystallization. The enhanced local deformability is attributed to the synergistic interplay of two key mechanisms: (1) enhanced work-hardening capability due to the formation of martensite produced by cold rolling tempering and (2) the transformation-induced plasticity effect of the reversed austenite, which effectively coordinates localized deformation and suppresses crack nucleation.