Effects of grain size and thickness on creep deformation of aluminium thin foils with meso-scale

被引：0

作者：

Zhou, Qing ^{[1
]}

Itoh, Goroh ^{[2
]}

机构：

[1] Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

[2] Department of Mechanical Engineering, College of Engineering, Ibaraki University, Hitachi 316-8511, Japan

来源：

Jinshu Xuebao/Acta Metallurgica Sinica | 2008年 / 44卷 / 03期

关键词：

Aluminum foil - Creep - Deformation - Grain boundaries - Strain rate;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Constant stress creep experiments were carried out at 200°C for aluminium thin foils with a thickness range of 10-350μm. The effects of the thickness (t) and the grain size (d) on the strain rate (Ε) were studied and the parameter, t/d, can better describe those effects. Subgrains were found near the grain boundary by TEM in the deformed specimen with t/d n (t/d)1.95, n = n′-0.815ln (t/d), n′ is the stress exponent of the block meterial, was obtained to describe the relation of t/d to Ε, which basically depended on the ratio of grain boundary area to the free boundary area.

引用

页码：336 / 340