Third-type of Strain Aging of GH4720Li Over a Wide Range of Temperatures and Strain Rates

IF 0.6 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Chiang Mai Journal of Science Pub Date : 2022-09-30 DOI:10.12982/cmjs.2022.088

Jie Chen, Zhijun Wang, H. Zhang, Qingxiang Yang, Hongtao Zhang, Ruo-Xun Zhai

引用次数: 0

Abstract

In this study, the working environment of the GH4720Li alloy was simulated using a dynamic compression test with a strain rate range of 0.01–4000 s-1 and a temperature range of 20–1000 °C, and its dynamic mechanical properties under operating conditions were studied. Based on the signifi cant volume of the test data, it was observed that there was an abnormal stress peak in the GH4720Li alloy owing to third strain aging. The third strain aging behavior is an irregular bell-shaped stress curve. In addition, the effects of the temperature and strain rate on the bell-shaped stress curve were studied. With an increase in the strain rate, the bell-shaped stress curve shifted to the high-temperature zone, and the stress peak and temperature width of the bell-shaped curve gradually decreased. Finally, the change mechanism of the strain rate effect on the bell-shaped stress curve is explained from a microscopic point of view.

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GH4720Li在大温度和应变速率下的第三类应变时效

本研究采用应变速率范围为0.01 ~ 4000 s-1，温度范围为20 ~ 1000℃的动态压缩试验，模拟GH4720Li合金的工作环境，研究其在工作条件下的动态力学性能。基于大量的试验数据，可以观察到GH4720Li合金由于第三应变时效而出现异常应力峰。第三种应变时效行为为不规则的钟形应力曲线。此外，还研究了温度和应变速率对钟形应力曲线的影响。随着应变速率的增大，钟形应力曲线向高温区移动，钟形曲线的应力峰值和温度宽度逐渐减小。最后，从微观角度解释了应变率效应对钟形应力曲线的变化机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chiang Mai Journal of Science MULTIDISCIPLINARY SCIENCES-

CiteScore

1.00

自引率

25.00%

发文量

103

审稿时长

3 months

期刊介绍： The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.