1. Dependence of deformation behavior on grain size and strain rate in an ultrahigh strength-ductile Mn-based TRIP alloy
- Author
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W.J. Zhu, Minghui Cai, Peter Hodgson, Qi Chao, Nicole Stanford, L.B. Pan, Cai, MH, Zhu, WJ, Stanford, N, Pan, LB, Chao, Q, and Hodgson, PD
- Subjects
Materials science ,materials science ,TRIP steel ,science & technology - other topics ,02 engineering and technology ,Flow stress ,Plasticity ,metallurgy & metallurgical engineering ,01 natural sciences ,materials science, multidisciplinary ,0103 physical sciences ,General Materials Science ,Ductility ,grain size ,010302 applied physics ,Austenite ,strain rate ,Mechanical Engineering ,Metallurgy ,lüders band propagation (LBP) ,Strain rate ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Grain size ,martensitic transformation ,nanoscience & nanotechnology ,Mechanics of Materials ,Martensite ,0210 nano-technology - Abstract
A novel ultra-high strength TRIP (transformation induced plasticity) steel, with similar to 1.5 GPa strength and good ductility of similar to 26% has been produced. The microstructure consists of ultrafine ferrite, and a large volume fraction of austenite. The flow stress was significantly increased by a reduction in the grain size, but the effect of strain rate on the flow stress was negligible. The formation of stress induced martensite was found to increase linearly with strain, and a reduction in the grain size correlated with an increase in the stress required to form the martensite. Refereed/Peer-reviewed
- Published
- 2016