Abstract
The effects of pre-ageing on the tensile properties of a thermomechanically treated 6201 aluminium alloy were examined. It was found that the pre-ageing effects can be either beneficial or detrimental depending on the amount of cold work applied prior to final ageing. The pre-ageing performed was at 135° C for 30 min. The final ageing was at 140° C for various time periods. Pre-ageing combined with 60% cold work improves the tensile properties. However, pre-ageing combined with 80% cold work shows a detrimental effect on the tensile properties of 6201 alloy. The mechanisms are explained in terms of transmission electron microscopy.
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