武汉理工大学学报-材料科学版(英文版),
2010, 25(3): 395-398.
doi: 10.1007/s11595-010-0009-z
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1.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
3.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
4.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
5.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
6.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
7.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
8.Taiyuan Heavy Machinery Plant, Taiyuan 030024, China
基金项目:
the Natural Science Foundation of Shanxi Province,China(2006011051)
Shanxi Research Fund for Returned Scholars(2007-25)
the Specialized Fund for the Innovation of College Student of Taiyuun City(08122067;07010727)
Effect of ECAP on the Microstructure and Mechanical Properties of a High-Mg2Si Content Al-Mg-Si Alloy
BIAN Liping
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, LIANG Wei
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, MA Jian
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, WANG Shunqi
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, CHEN Kehua
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, XUE Jinbo
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, WANG Hongxia
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, LIANG Aiping
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1.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
3.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
4.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
5.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
6.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
7.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
8.Taiyuan Heavy Machinery Plant, Taiyuan 030024, China
Keywords：
equal channel angular pressing (ECAP)
A high-Mg2Si content AI alloy was extruded by equal channel angular pressing (ECAP)for 8 passes at 250 ℃ and an ultrafine-grained structure with an average grain size of about 1 .5 μm was achieved . The coarse skeleton-shaped Mg2Si phase presenting in the as-cast alloy are significantly frag-mented into fine rod-shaped as well as equiaxed particles mostly less than about 230 nm and become rela-tively dispersed . The tensile strength 192 .8 MPa and the elongation up to 31 .3% at ambient temperature are attained in the 8-pass ECAPed alloy versus 163 .3 MPa and 9 .1% in the as-cast alloy . High-temperature creep test at 250 ℃ reveals that the ECAPed sample exhibits a high elongation close to 100% at a relatively high creep rate 7 .64×10-5 s-1, compared to the elongation 56% at a low strain rate 1 .74×10-7 s-1 in the as-cast alloy .
参考文献
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Chowdhury SG;Xu C;Langdon TG .Texture evolution in an aluminum alloy processed by ECAP with concurrent precipitate fragmentation[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):219-225. |
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Shunqi Wang;Wei Liang;Yu Wang;Liping Bian;Kehua Chen .A modified die for equal channel angular pressing[J].Journal of Materials Processing Technology,2009(7):3182-3186. |
