Abstract
The Vickers hardness time–temperature–property (TTP) diagrams for aluminium alloy 1933 were constructed by an interrupted quenching technique. The nose temperature of TTP diagram for 99·5% maximum attainable hardness was about 310°C, at which the hardness decreased rapidly with increasing isothermal holding time. Comparison of TTP diagrams for 1933 and 7050 alloys indicated lower quench sensitivity for the former alloy. The reason was discussed mainly according to the difference in their chemical compositions.
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