J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 983-987
Dynamic yield and tensile strength of LY12 aluminum alloy at elevated temperaturesYonggang Wang1, 2, Hongliang He1, 2, Denping Chen2, Lili Wang1, 2 and Fuqian Jing1, 2
1 Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, PO Box 919-102, Mianyang 621900, Sichuan, China
2 Mechanics & Materials Science Res. Center, Ningbo University, Zhejiang 315211, China
Published online: 26 July 2006
Wave profile measurements are presented for LY12 aluminum alloy with a wide range of pre-heating from the room temperature to approaching the melting point, and the dependences of dynamic yield strength and tensile strength on the initial sample temperature have been investigated. Experimental results indicate that dynamic yield strength decreases rapidly with the heating temperature. Decrease of the spall strength with the increase of heating temperature for LY12 aluminum alloy was observed also, and nearly 80% loss of spall strength was determined in the present temperature range. An empirical formulation has been proposed to normalize the dependence of spall strength on the heating temperature, and it gives a fairly good fitting for a number of aluminum based materials, including pure aluminum, aluminum alloy and single crystal aluminum, measured by this work and by others in the literature.
© EDP Sciences 2006