Determining a Retrogression Heat Treatment to Apply during Warm Forming of a High Strength Aluminum AA7075 Sheet Material
Determining a Retrogression Heat Treatment to Apply during Warm Forming of a High Strength Aluminum AA7075 Sheet Material
复制标题
确定高强度铝 AA7075 板材温成形期间应用的回归热处理
DOI：
10.1007/978-3-319-72284-9_33
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Katherine Rader, Thomas Ivanoff
中科院分区：
文献类型：
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作者：
Katherine Rader, Thomas Ivanoff
将回火热处理与同步热成形相结合，可以显著提高高强度铝合金AA7075-T6板材材料的成形性，同时通过单次时效处理恢复近峰时效强度。这种成形高强度铝合金板材的新工艺被称为后退成形。研究了适用于AA7075-T6板材退热成形的次数和温度。差示扫描量热法用于测定与沉淀溶解有关的活化能。热处理实验确定了硬度随温度和时间的变化。利用温度补偿时间的概念构造了一条主曲线，预测了适当的退变形成条件。
Combining retrogression heat treatment with simultaneous warm forming provides an opportunity to significantly increase the formability of high-strength aluminum alloy AA7075-T6 sheet material while subsequently regaining nearly peak-aged strength through a single reaging treatment. This new technological approach to forming high-strength aluminum alloy sheet is termed retrogression forming. Times and temperatures suitable to the retrogression forming of AA7075-T6 sheet material are examined. Differential scanning calorimetry is used to determine the activation energy associated with precipitate dissolution during retrogression. Heat treating experiments determine the changes in hardness during retrogression as a function of temperature and time. The concept of temperature-compensated time is used to construct a master curve that predicts appropriate retrogression forming conditions.