doi: 10.3850/S20104286201500126X

Mechanical Behavior of Aluminum Alloyover a Wide Strain Rate and Temperature Range

Lei Dai¹, Tao Suo², Zhong-bin Tang², Bu-sheng Zhang², Xue-ling Fan³, Zhi-qiang Wang¹ and Liang Hou^{1 1}Shanghai Engineering Research Center of Civil Aero Engine,
AVIC Commercial Aircraft Engine Co., LTDShanghai,201108, China ²School of Aeronautics, Northwestern Polytechnical University Xi'an, Shanxi,
710072, China ³State Key Laboratory for Strength and Vibration of Mechanical Structures,
Xi'an Jiaotong University Xi'an 710049, China

ABSTRACT

In this work, the compressive mechanical behavior of a kind of aluminum alloy was experimentally investigated over a wide temperature and strain rate range. The coupling effects of temperature and strain rate were analyzed quantitatively. The results show that the flow stress depends on both strain rate and temperature. The temperature sensitivity of aluminum alloy increases remarkably with experimental temperature. However, the strain rate sensitivity of the material varies slightly with applied strain rate. Based on experimental results, the parameters of Johnson-Cook constitutive model were also fitted.

Keywords: Flow stress, Strain rate sensitivity, Temperature sensitivity, Constitutive model.

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