Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 20    No. 3    March 2010

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Effects of rheoforming on microstructures and mechanical properties of 7075 wrought aluminum alloy
GUO Hong-min(郭洪民)1, YANG Xiang-jie(杨湘杰)1, WANG Jia-xuan(王家宣)2,
HU Bin(胡 斌)1, ZHU Guang-lei(朱光磊)1

1. School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China;
2. School of Materials Science and Engineering, Nanchang Aerospace University, Nanchang 330063, China

Abstract:It is economically advantageous to cast wrought aluminum alloys directly into near-net-shape components. The objective of the present work is to take advantage of the rheoforming with 7075 alloy to improve the competitiveness of this emerging technology in the manufacture of wrought aluminum alloy. High quality semi-solid slurry was produced, in which primary α(Al) presents in diameter of 62 μm and shape factor of 0.78 and features no eutectics entrapped. Higher forming pressure results in small grain size, improved shape factor and higher density. Especially, rheoforming can effectively reduce the occurrence of hot tearing. The average yield strength and elongation of the rheoformed samples in the T6 condition are 483 MPa and 8%, respectively.


Key words: 7075 Al alloy; rheoforming; semi-solid processing

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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