Grain refinement, thermal stability and tensile properties of 2024 aluminum alloy after equal-channel angular pressing

被引：72
作者：
Mao, J
Kang, SB
Park, JO
机构：
[1] Korea Inst Machinery & Mat, Dept Mat Engn, Chang Won 641010, South Korea
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2005年 / 159卷 / 03期
关键词：
severe plastic deformation; equal-channel angular pressing; grain refinement; tensile properties; thermal stability;
D O I：
10.1016/j.jmatprotec.2004.05.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure evolution and tensile properties of 2024 aluminum alloy after severe plastic deformation by equal-channel angular pressing (ECA pressing) have been studied with different initial aging treatment conditions. The experimental results reveal that ECA pressing produces ultrafine grains to a submicrometer level of around 0.25 mum in both peak- and over-aged specimens. Moreover, these ultrafine grains have limited grain growth when ECA pressings are subsequently annealed at temperatures upto 300degreesC. The values of 0.2% proof stress and ultimate tensile stress (UTS) are improved without significant loss of ductility for both peak- and over-aged specimens after various passages of ECA pressing at two temperatures of 150 and 190degreesC. An optimum tensile property was achieved in a peak-aged specimen after eight passages of ECA pressing at a temperature of 150degreesC. (C) 2004 Elsevier B.V All rights reserved.
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收藏
页码：314 / 320
页数：7
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