Abstract
AA7075 Al alloy sheet shows low r-value (plastic strain ratio) and low deep drawability. To increase average r-value ( -value) of AA7075 Al alloy sheets, the sheets were asymmetrically rolled and subsequently heat treated in a salt bath as the first action, followed by the second asymmetry rolling and subsequent heat treatment in a salt bath. The second 22% asymmetrically rolled and subsequent heat-treated AA7075 Al sheet shows 1·41 times higher average r-value (-value) than that of initial specimen. This result could be explained by the texture changes of AA7075 Al alloy sheet after two steps asymmetry rolling and subsequent heat treatment.
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