DYNAMIC MECHANICAL BEHAVIOR OF 6061 AL ALLOY AT ELEVATED TEMPERATURES AND DIFFERENT STRAIN RATES |
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Authors: | Xueling Fan Tao Suo Qin Sun Tiejun Wang |
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Affiliation: | 1. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering,Xi'an Jiaotong University, Xi'an 710049, China 2. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China |
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Abstract: | The compressive stress-strain relationships of 6061Al alloy over wide temperatures and strain rates are investigated. The dynamic impact experiments are performed using an improved high temperature split Hopkinson pressure bar apparatus. The experimental results are compared with those obtained by the modified Johnson-Cook constitutive model. It is found that the dynamic mechanical behavior depends sensitively on temperature under relatively low strain rates or on strain rate at relatively high temperatures. The good agreement indicates that it is valid to adopt the parameter identification method and the constitutive model to describe and predict the mechanical response of materials. |
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Keywords: | dynamics plastic high temperature alloy impact testing |
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