Scholarlink

<p>In the framework of integrated computational materials engineering (ICME), combined with high-throughput thermodynamic and kinetic calculations, the composition and intercritical annealing temperature were designed for a 1180&#xa0;MPa grade low-carbon and low-alloy transformation-induced plasticity (TRIP) steel. The steel with a composition of Fe–0.26C–2.19Mn–0.91Si–0.76Al (wt%) had a good TRIP effect resulting from the retained austenite (RA) with higher stability. After intercritical annealing at 780 ℃ for 240&#xa0;s, followed by over-aging at 370&#xa0;℃ for 300&#xa0;s, the steel had an ultimate tensile strength (UTS) of 1261&#xa0;MPa, a total elongation (TE) of 21.2%, and a product of strength and elongation (PSE) of 26.77 GPa%, exhibiting excellent mechanical properties. Moreover, due to the importance of bainite in balancing strength and plasticity, a kinetic model based on shear transformation was optimized by combining thermal expansion analysis with in situ analysis of the microstructural transformation in steels. The bainitic transformation in steels with annealed microstructures consisting of ferrite and austenite could be accurately predicted by the kinetic model, enabling the optimization of the over-aging temperature accordingly. This provided a theoretical basis for predicting the microstructure of TRIP steel and improving the integrated computational materials design method for advanced high-strength steels (AHSS).</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

Design of TRIP steel with 1180 MPa grade by integrated computational materials engineering

  • 期刊论文

  • 发表日期：

    2025年11月12日

查看全文
  • Yueshan Jiang,
  • Junxiong Wang,
  • Yanlin He,
  • Li Lin,
  • Xin Xu,
  • Rendong Liu,
  • Lin Li

摘要

In the framework of integrated computational materials engineering (ICME), combined with high-throughput thermodynamic and kinetic calculations, the composition and intercritical annealing temperature were designed for a 1180 MPa grade low-carbon and low-alloy transformation-induced plasticity (TRIP) steel. The steel with a composition of Fe–0.26C–2.19Mn–0.91Si–0.76Al (wt%) had a good TRIP effect resulting from the retained austenite (RA) with higher stability. After intercritical annealing at 780 ℃ for 240 s, followed by over-aging at 370 ℃ for 300 s, the steel had an ultimate tensile strength (UTS) of 1261 MPa, a total elongation (TE) of 21.2%, and a product of strength and elongation (PSE) of 26.77 GPa%, exhibiting excellent mechanical properties. Moreover, due to the importance of bainite in balancing strength and plasticity, a kinetic model based on shear transformation was optimized by combining thermal expansion analysis with in situ analysis of the microstructural transformation in steels. The bainitic transformation in steels with annealed microstructures consisting of ferrite and austenite could be accurately predicted by the kinetic model, enabling the optimization of the over-aging temperature accordingly. This provided a theoretical basis for predicting the microstructure of TRIP steel and improving the integrated computational materials design method for advanced high-strength steels (AHSS).