Microstructures and Mechanical Properties of TRIP/TWIP Steels
Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 6829
Interests: material processing; high temperature alloys
Special Issues, Collections and Topics in MDPI journals
Ultra-high manganese steels containing 15–25 weight % Mn and with additions of Si and Al of ~2–4 weight % are characterized by a high-strength–high-ductility combination, excellent formability, and superior fracture toughness because of TRIP (transformation-induced plasticity) or TWIP (twinning-induced plasticity) effects. Fe-C-Mn alloys have relatively low stacking fault energy. The addition of Al and Si elements to the Fe–Mn alloys impacts their stacking fault energy and phase stability, leading to variable mechanical properties that are governed by the extent of deformation twinning and strain-induced martensitic transformation, namely, γ(fcc)→ε(hcp) and γ(fcc)→α(bct). Recent studies have indicated that the Fe–Mn–Al–Si alloy primarily exhibits a TRIP effect when the manganese content is less than 15 weight %, while the TWIP effect is dominant when manganese content is higher than 25 weight %. However, when the manganese content is 15–25 weight %, the TRIP and TWIP effects coexist. TRIP/TWIP steels are effective candidates for automotive sheet because they can reduce the weight of the automotive components, improve fuel efficiency, reduce emission, and enhance the degree of safety.
The Special Issue will include articles reporting new and progressive research results in the areas of medium Mn and high Mn steels, as well as reviews of particular classes of fundamental physics of the materials and their applications. Manuscripts will be welcomed from both fundamental scientific researchers and authors belonging to industrial companies involved in the field.
Prof. Dr. Zhengyou Tang
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- Mechanical properties
- Medium Mn steel
- High Mn steel
- Deformation mechanism