Nanotwinned microstructures from low stacking fault energy brass by high-rate severe plastic deformation

被引：42
作者：
Cai, J. [1 ]
Shekhar, S. [1 ]
Wang, J. [1 ]
Shankar, M. Ravi [1 ]
机构：
[1] Univ Pittsburgh, Dept Ind Engn, Pittsburgh, PA 15261 USA
来源：
SCRIPTA MATERIALIA | 2009年 / 60卷 / 08期
基金：
美国国家科学基金会;
关键词：
Severe plastic deformation; Twinning; Nanostructure; ULTRAHIGH-STRENGTH; HIGH-DENSITY; COPPER; TEMPERATURE; TWINS; TITANIUM; METALS; FIELD; SPD;
D O I：
10.1016/j.scriptamat.2008.12.024
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
High-rate severe plastic deformation by machining is explored in a prototypical low stacking fault energy material, brass, as a route for generating a high density of nanometer-scale twins amidst dislocation structures. This nanotwinned system shows a greatly improved strength compared to the bulk microcrystalline state. The twin densities are found to be retained even after modest thermal agitation, which is also seen to engender a small "hardening by annealing" effect in the nanotwinned material. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：599 / 602
页数：4
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