Phase transformation of Mg-Li alloys induced by super-high pressure

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• 作者：Wenshi Wu ; Qiuming Peng ; Jianxin Guo ; Shuangshuang Zhao
• 关键词：Phase transformation ; Mechanical properties ; Mg&ndash ; Li alloys
• 刊名：Materials Letters
• 出版年：15 February, 2014
• 年：2014
• 卷：117
• 期：Complete
• 页码：45-48
• 全文大小：1284 K

文摘

The effect of superhigh pressure (4 GPa) on phase transformation behavior and mechanical properties of a duplex phase Mg-7 wt%Li alloy has been investigated in the temperature range from 450 to 1150 掳C. Hardness and tensile strength of Mg-7 wt%Li alloy have been significantly improved by super-high pressure treatment at 700 掳C for 120 min. The microstructural observation is confirmed that super-high pressure is of benefit for phase transformations from bcc-Li₃Mg₇ to hcp phases and hcp-Li₃Mg₁₇ to hcp-Li_0.92Mg_4.08. The improved mechanical properties are mainly associated with the reduction of bcc-Li₃Mg₇ phase and the formation of {1 0 鈭? 1} compression twins in hcp-Li_0.92Mg_4.08 phase.