Article ID Journal Published Year Pages File Type
1499235 Scripta Materialia 2013 6 Pages PDF
Abstract

A surface layer with a gradient decrease in twin density has been produced in a Fe–Mn austenitic steel, which corresponds to a gradient drop in hardness from 5.3 GPa in the top surface to 2.2 GPa in the coarse grained core. The dependence of hardness on the twin thickness was determined, showing a weaker strengthening effect of twin boundaries than that of conventional grain boundaries in this alloy. Superior strength–ductility synergy was observed in tensile tests of the gradient nanotwinned layer.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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