Effect of billet diameter on hot extrusion behavior of Mg-Al-Zn alloys and its influence on microstructure and mechanical properties
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- 作者：Sang-Hoon Kima ; Bong Sun Youb ; Sung Hyuk Parka ; sh.park@knu.ac.kr" class="auth_mail" title="E-mail the corresponding author
- 关键词：Magnesium ; Extrusion ; Billet diameter ; Size effect ; Tensile properties
- 刊名：Journal of Alloys and Compounds
- 出版年：2017
- 出版时间：5 January 2017
- 年：2017
- 卷：690
- 期：Complete
- 页码：417-423
- 全文大小：2125 K
文摘
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The billet diameter affects the microstructure/properties of extruded Mg alloys.
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A decrease in billet diameter increases the strain rate induced during extrusion.
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A higher strain rate promotes dynamic recrystallization/precipitation behavior.
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The resulting grain refinement and increase in precipitates improve the strength.
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This size effect is more pronounced in AZ91 alloy than in AZ61 alloy.