Tensile specimens of the 7475 aluminum alloy were investigated in order to understand the mechanism of cavitation at different levels of strain. For this purpose a temperature and strain-rate pertinent to maximum level of cavitation were selected and the constant strain rate tests were interrupted at appropriate strain levels. This was supplemented with microstructural observations and density measurements. The percentage cavitation increases with strain in this alloy. The experimental result is assessed with respect to Stowell's model and plasticity-controlled hole growth.

Bhagwati P. Kashyap

Department of Metallurgical & Materials Engineering

IIT Jodhpur

M.K. Rao

A.K. Mukherjee

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