Non-linear response of internal friction to tensile strain rate and frequency during plastic deformation of high-purity aluminium期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Non-linear response of internal friction to tensile strain rate and frequency during plastic deformation of high-purity aluminium

Authors:	J X Zhang J K L Lai

Affiliation:	(1) Department of Physics and Institute of Material Science, Zhongshan University, 510275 Guangzhou, People's Republic of China;(2) Department of Applied Science, City Polytechnic of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong

Abstract:	The internal friction of high-purity aluminium during the process of plastic deformation was measured by a middle torsion pendulum on a modified tensile testing machine. The effects of tensile strain rate, $\dot \varepsilon$ , in the range of 0.73×10^–6 to 50×10^–6s^–1, and frequency of internal friction measurement, f, in the range of 0.38 to 2.6 Hz were studied. The results showed a non-linear dependence of internal friction, Q ^–1, on $\dot \varepsilon$ and f ^–1 or on $\dot \varepsilon /\omega$ (=2 f). The interrelationship between internal friction during the process of plastic deformation and dislocation motion, and the effect of non-linearity on the dynamic behaviour of dislocations are discussed.

Keywords:
本文献已被 SpringerLink 等数据库收录！