Transformation-induced extraordinary ductility in an ultrafine-grained alloy with nanosized precipitates

被引：40

作者：

Lee, Y. K. ^{[1
]}

Jin, J. E.

Ma, Y. Q.

机构：

[1] Yonsei Univ, Dept Met Engn, Seoul 120749, South Korea

[2] Xiamen Univ, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China

来源：

SCRIPTA MATERIALIA | 2007年 / 57卷 / 08期

关键词：

ultrafine-grained alloy; strain-induced martensite; nano precipitates; strain hardening; uniform elongation;

D O I：

10.1016/j.scriptamat.2007.06.047

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An ultrafine-grained (UFG) alloy with nanosized precipitates was fabricated by strain-induced martensitic transformation and the reverse transformation through a conventional rolling and annealing process. The UFG alloy possesses a high yield stress (860 MPa), five times higher than that of coarse-grained alloy, very high tensile stress (1140 MPa), and exceptional uniform elongation of above 30% due to both precipitates and strain-induced martensite that form in these alloys during tensile tests. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：707 / 710

页数：4

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