Abstract
The current study proposes a room-temperature quenching and partitioning (RT-Q&P) process to design new steels with an ultrahigh tensile strength (1.3 ~ 1.5 GPa) and a large total elongation (19 ~ 3 pct). This steel has a dual-phase microstructure with metastable austenite grains embedded in the martensite matrix. The martensitic transformation in retained austenite grains can not only provide the transformation-induced plasticity effect but also enable the strain gradient plasticity, enhancing the work hardening behavior of present steel.
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M.X. Huang acknowledges the financial support from the National Natural Science Foundation of China (Nos. U1764252, U1560204) and the Research Grants Council of Hong Kong (Nos. 17255016, 17203014, C7025-16G).
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He, B.B., Liu, L. & Huang, M.X. Room-Temperature Quenching and Partitioning Steel. Metall Mater Trans A 49, 3167–3172 (2018). https://doi.org/10.1007/s11661-018-4718-9
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DOI: https://doi.org/10.1007/s11661-018-4718-9