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.
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收藏
页码：707 / 710
页数：4
相关论文
共 26 条
[1]  
HOLLOMON JH, 1945, T AM I MIN MET ENG, V162, P268
[2]   An investigation of grain boundaries in submicrometer-grained Al-Mg solid solution alloys using high-resolution electron microscopy [J].
Horita, Z ;
Smith, DJ ;
Furukawa, M ;
Nemoto, M ;
Valiev, RZ ;
Langdon, TG .
JOURNAL OF MATERIALS RESEARCH, 1996, 11 (08) :1880-1890
[3]   An investigation of microstructural evolution during equal-channel angular pressing [J].
Iwahashi, Y ;
Horita, Z ;
Nemoto, M ;
Langdon, TG .
ACTA MATERIALIA, 1997, 45 (11) :4733-4741
[4]   Deformation behavior and plastic instabilities of ultrafine-grained titanium [J].
Jia, D ;
Wang, YM ;
Ramesh, KT ;
Ma, E ;
Zhu, YT ;
Valiev, RZ .
APPLIED PHYSICS LETTERS, 2001, 79 (05) :611-613
[5]   Effect of grain size on the uniform ductility of a bulk ultrafine-grained alloy [J].
Jin, Jae-Eun ;
Jung, Yeon-Seung ;
Lee, Young-Kook .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 449 :786-789
[6]   Optimization of strength and ductility in nanocrystalline and ultrafine grained metals [J].
Koch, CC .
SCRIPTA MATERIALIA, 2003, 49 (07) :657-662
[7]   Ultrahigh strength and high electrical conductivity in copper [J].
Lu, L ;
Shen, YF ;
Chen, XH ;
Qian, LH ;
Lu, K .
SCIENCE, 2004, 304 (5669) :422-426
[8]   Instabilities and ductility of nanocrystalline and ultrafine-grained metals [J].
Ma, E .
SCRIPTA MATERIALIA, 2003, 49 (07) :663-668
[9]   Grain refinement and mechanical properties of a metastable austenitic Fe-Cr-Ni-Mn alloy [J].
Ma, YQ ;
Jin, JE ;
Lee, YK .
PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5, 2005, 475-479 :43-48
[10]   A repetitive thermomechanical process to produce nano-crystalline in a metastable austenitic steel [J].
Ma, YQ ;
Jin, JE ;
Lee, YK .
SCRIPTA MATERIALIA, 2005, 52 (12) :1311-1315
123