Improvement of warm formability of Al-Mg sheet alloys containing coarse second-phase particles

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作者：
Arne K DAHLE [1 ]
Amit K GHOSH [2 ]
机构：
[1] Materials Engineering, University of Queensland
[2] Department of Materials Science and Engineering, University of
来源：
Science in China(Series E:Technological Sciences) | 2009年 / 52卷 / 01期
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摘要：
Several alloying elements involving Zr, Cu, Zn and Sc were added to Al-Mg sheet alloys in order to obtain an excellent combination of high strength and good high-temperature formability. Microstruc-tural examination showed that coarse intermetallic particles were formed in the microstructure and their amounts changed with variations of the alloying elements. During warm rolling of thermome-chanical treatments prior to warm deformation, the coarse particles initiated cracks, decreasing the warm formability. For healing the crack damage and further improving the warm formability, a process of hot isothermal press was developed and optimized to the sheet alloys. With this process, the biaxial stretch formability at 350℃ was improved by 22% for an aluminum alloy containing a large amount of coarse particles.
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页码：41 / 45
页数：5
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