Architectured surface layer with a gradient nanotwinned structure in a Fe-Mn austenitic steel
Architectured surface layer with a gradient nanotwinned structure in a Fe-Mn austenitic steel
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DOI：
10.1016/j.scriptamat.2012.05.041
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发表时间：
2013-01-01
影响因子：
6
通讯作者：
Lu, K.
中科院分区：
文献类型：
--
作者：
Wang, H. T.;Tao, N. R.;Lu, K.
在 Fe-Mn 奥氏体钢中产生了孪晶密度梯度下降的表面层，这对应于硬度从顶面的 5.3 GPa 梯度下降到粗晶粒芯部的 2.2 GPa。确定了硬度对孪晶厚度的依赖性，表明该合金中孪晶界的强化作用比传统晶界的强化作用更弱。在梯度纳米孪晶层的拉伸测试中观察到优异的强度-延展性协同作用。 (C) 2012 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
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.