Abstract

In this work, Al–Mg–Si/Al–Zn–Mg laminated composite sheets were successfully produced first time by combining AA6082 and AA7204 sheets through the cross accumulative roll bonding process. Two different starting materials were rolling bonded as alternate layers up to 8 rolling cycles with 408 °C pre-heating for 20 min before each cycle. In-situ corrosive surface was characterized by the electron backscattered diffraction to study the relationship between the grain orientation and the corrosion behavior of Al–Mg–Si/Al–Zn–Mg composite sheets. 78.2% of the volume fraction of S-type ({123} <634>) texture, 46.0% of R-Cubic-type ({001} <110>) texture and 18.8% of Brass-type ({110} <112>) texture reduced during in situ corrosive tests. Corrosion results indicated that the excellent corrosion resistance mainly contributed from grains near Brass-type texture ({110} <112>). As the volume fraction of the Brass-type ({110} <112>) texture distributed in the Al–Zn–Mg alloy around the interface increased from 0.18 to 4.16% with the rolling reduction increased from 93.7 to 99.2%, the corrosion resistance of the laminated rolling material improved.

Graphic Abstract

中文翻译：

---

交叉累积辊压粘合对AA6082 / AA7204复合片材腐蚀行为的影响

摘要

在这项工作中，通过交叉累积辊压粘合工艺将AA6082和AA7204薄板组合在一起，成功地成功生产了Al-Mg-Si / Al-Zn-Mg叠层复合板。在每个循环之前，将两种不同的原材料作为交替的层进行滚动粘合，直至8个轧制循环，并在408°C下预热20分钟。通过电子反向散射衍射对原位腐蚀表面进行表征，以研究晶粒取向与Al–Mg–Si / Al–Zn–Mg复合板的腐蚀行为之间的关系。S型（{123} <634>）纹理的体积分数的78.2％，R-Cubic型（{001} <110>）纹理的46.0％和黄铜型（{110} <112 >）在原位腐蚀测试中织构降低。腐蚀结果表明，优异的耐腐蚀性主要来自黄铜型织构（{110} <112>）附近的晶粒。随着分布在界面附近的Al-Zn-Mg合金中的黄铜型（{110} <112>）的体积分数从0.18增加到4.16％，而压下率从93.7增加到99.2％，耐腐蚀性层压轧制材料的比值得到改善。

图形摘要