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Investigation on the plastic work-heat conversion coefficient of 7075-T651 aluminum alloy during an impact process based on infrared temperature measurement technology

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文摘 The plastic work-heat conversion coefficient is one key parameter for studying the work-heat conversion under dynamic deformation of materials. To explore this coefficient of 7075-T651 aluminum alloy under dynamic compression, dynamic compression experiments using the Hopkinson bar under four groups of strain rates were conducted, and the temperature signals were measured by constructing a transient infrared temperature measurement system. According to stress versus strain data as well as the corresponding temperature data obtained through the experiments, the influences of the strain and the strain rate on the coefficient of plastic work converted to heat were analyzed. The experimental results show that the coefficient of plastic work converted to heat of 7075-T651 aluminum alloy is not a constant at the range of 0.85–1 and is closely related to the strain and the strain rate. The change of internal structure of material under high strain rate reduces its energy storage capacity, and makes almost all plastic work convert into heat.
来源 Acta Mechanica Sinica ,2018,34(2):327-333 【核心库】
DOI 10.1007/s10409-017-0673-8
关键词 Plastic work-heat conversion coefficient ; Infrared temperature measurement ; Dynamic compression ; 7075-T651 Aluminum alloy
地址

1. Beijing Institute of Technology, State Key Laboratory of Explosion Science and Technology, Beijing, 100081  

2. Institute of Mechanics, Chinese Academy of Sciences, State Key Laboratory of Nonlinear Mechanics, Beijing, 100190

语种 英文
文献类型 研究性论文
ISSN 0567-7718
学科 金属学与金属工艺
基金 国家自然科学基金
文献收藏号 CSCD:6248917

参考文献 共 24 共2页

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引证文献 3 篇

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