TENSILE DEFORMATION BEHAVIOR OF HIGH MANGANESE AUSTENITIC STEEL: THE ROLE OF GRAIN SIZE
作者： G. Dini , A. Najafizadeh , R. Ueji , S.M. Monir-Vaghefi
DOI: 10.1016/J.MATDES.2010.01.049
关键词:
摘要: Abstract The tensile deformation behavior and microstructural evolutions of twinning induced plasticity (TWIP) steel with the chemical composition Fe–31Mn–3Al–3Si average grain sizes in range 2.1–72.6 μm have been analyzed. For each size, Hollomon analysis also Crussard–Jaoul (C–J) as an alternative method to describe work hardening were investigated. results indicated that optimum mechanical properties a function capacity can be obtained by changing size. observations showed pile-ups planar dislocations are necessary for triggering refinement suppresses TWIP steel. Furthermore, increases increasing applied strain. As result, high instantaneous due twin boundaries enhances uniform elongation. contribution from strain increase hardness twinned regions (i.e., Basinski mechanism) may useful achieving strength–ductility steels.
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