Architectured surface layer with a gradient nanotwinned structure in a Fe-Mn austenitic steel

被引：108
|
作者：
Wang, H. T. [1 ]
Tao, N. R. [1 ]
Lu, K. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
来源：
SCRIPTA MATERIALIA | 2013年 / 68卷 / 01期
关键词：
Architectured materials; Nanoscale twins; Surface mechanical grinding treatment; Gradient structure; MECHANICAL ATTRITION TREATMENT; COMPOSITIONALLY GRADED MATERIALS; STAINLESS-STEEL; COPPER; BOUNDARIES; STRENGTH; REFINEMENT; CONTACT; SCALE;
D O I：
10.1016/j.scriptamat.2012.05.041
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：22 / 27
页数：6
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