Effects of Minor Erbium on Microstructure and Mechanical Properties of Al-Mg-Mn Alloy

Both Al-6.8 Mg-0.3Mn and Al-6.8Mg-0.3Mn-0.4Er (mass fraction/%) alloy ingots were prepared with semi-continuous casting process, and the alloy ingots were rolled into 4mm thick sheets after homogenization treatment and multipass hot rolling. The effect of Er on microstructure and mechanical properti...

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Bibliographic Details
Published in:Hang kong cai liao xue bao 2014-10, Vol.34 (5), p.17-24
Main Authors: Zhang, Jin-Wu, Bai, Pu-Cun, Hou, Xiao-Hu, Li, Bo
Format: Article
Language:Chinese
Subjects:
Aluminum base alloys
Annealing
Erbium
Homogenizing
Ingot casting
Ingots
Mechanical properties
Microstructure
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Summary:Both Al-6.8 Mg-0.3Mn and Al-6.8Mg-0.3Mn-0.4Er (mass fraction/%) alloy ingots were prepared with semi-continuous casting process, and the alloy ingots were rolled into 4mm thick sheets after homogenization treatment and multipass hot rolling. The effect of Er on microstructure and mechanical properties of Al-Mg-Mn alloy sheets at different annealing temperatures were investigated. The results show that the addition of minor Er can improve the strength of the Al-Mg-Mn alloy significantly as well as the coordination between strength and plasticity of the alloy. Besides, the ability of anti-recrystallization and mechanical properties at room temperature are largely enhanced. Finally by annealing at 300 degree C for 1h, the Al-Mg-Mn-Er alloy sheet obtains the optimum application values of sigma (b), sigma (s) and phi , which are 421MPa, 310MPa and 18.3% respectively.
ISSN:1005-5053
DOI:10.11868/j.issn.1005-5053.2014.5.004