Creep of Rheocast 7075 Aluminum Alloy at 300 °C

被引：3
|
作者：
Thongkam, Saravut [1 ]
Wisutmethangoon, Sirikul [2 ]
Wannasin, Jessada [1 ]
Chantaramanee, Suchart [1 ]
Plookphol, Thawatchai [1 ]
机构：
[1] Prince Songkla Univ, Fac Engn, Deparment Min & Mat Engn, Hat Yai 90112, Songkhla, Thailand
[2] Prince Songkla Univ, Dept Mech Engn, Fac Engn, Hat Yai 90112, Thailand
来源：
ADVANCED MATERIALS DESIGN AND MECHANICS II | 2013年 / 372卷
关键词：
Creep; 7075 aluminum alloy; Rheocast; Semi-solid; Gas Induced Semi-Solid; GISS; AL-ALLOY; BEHAVIOR;
D O I：
10.4028/www.scientific.net/AMM.372.288
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Creep of rheocast 7075-T6 aluminum alloy produced by the Gas Induced Semi-Solid (GISS) process was investigated at temperature of 300 degrees C and stress range of 20-70 MPa and compared to that of wrought 7075-T651 aluminum alloy. The rheocast 7075-T6 alloy exhibited lower minimum creep rate and longer rupture time than the wrought 7075-T651 alloy. The total rupture strain of the rheocast alloy was shorter than that of the wrought one. According to the power law creep, the stress exponents, n of the rheocast 7075-T6 and the wrought 7075-T651 alloys were 5.9 and 7.9 respectively. Based on the determined n values, the creep deformation of both alloys was possibly controlled by the dislocation glide and climb-controlled mechanism.
引用
收藏
页码：288 / +
页数：2
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