Compound role of tension twins and compression twins in microstructure and mechanical properties of Mg-Sn-Li rod

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• 作者：Yan Jiang^a ; Yu'an Chen^a ; ^b ; ^{yanj@cqu.edu.cn} ; ^{chenyuan@cqu.edu.cn} ; Yi Wang^a
• 关键词：Mg alloy ; Pre-strain ; Mechanical property ; Microstructure ; Twin
• 刊名：Materials Science and Engineering: A
• 出版年：2017
• 出版时间：13 January 2017
• 年：2017
• 卷：682
• 期：Complete
• 页码：31-37
• 全文大小：2084 K
• 卷排序：682

文摘

This work explores the compound effect of tension twins and compression twins on extruded Mg-5Sn-0.3Li, with an emphasis laid on the microstructure and mechanical properties. To induce both tension twins and compression twins, Mg-5Sn-0.3Li in the cast condition was chosen and subjected to 5% pre-compression. Both the pre-strained sample and unstrained sample were then exposed to extrusion. Our results reveal that pre-strained Mg-5Sn-0.3Li rods exhibit higher overall mechanical properties including yield strength, ultimate strength and elongation to failure in the extrusion condition. The relevant mechanisms were discussed.