Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 49A, Issue 8, Pages 3167-3172Publisher
SPRINGER
DOI: 10.1007/s11661-018-4718-9
Keywords
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Funding
- National Natural Science Foundation of China [U1764252, U1560204]
- Research Grants Council of Hong Kong [17255016, 17203014, C7025-16G]
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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 similar to 1.5 GPa) and a large total elongation (19 similar to 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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