Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 33, Issue 15, Pages 1713-1727Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02670836.2017.1312208
Keywords
Medium-Mn steels; austenite reverted transformation; transformation-induced plasticity; twinning-induced plasticity; austenite stability; mechanical properties
Funding
- Deutsche Forschungsgemeinschaft (DFG) within the Collaborative Research Centre (SFB) 761 'Steel - ab initio'
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In the automotive industry, the current development trend of lightweight and low-emission vehicles requests for high-performance materials. Benefiting from an excellent balance of mechanical properties and production cost, medium-Mn steels have attracted extensive interest by materials scientists. Austenite-reverted-transformation annealing plays a vital role in stabilisation of retained austenite and grain refinement, resulting in a considerable amount of retained austenite. Localised deformation phenomenon is usually observed in the ultrafine-grained medium-Mn steels owing to the absence of strain hardening. The occurrence of transformation-inducedplasticity and/ or twinning-induced-plasticity effect in austenite improves strain hardening effectively. In the current review, austenite-reverted-transformation annealing treatment routine, mechanical properties and deformation mechanisms and effect of heat treatment on microstructure and mechanical properties of medium-Mn steels are summarised.
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