Improved mechanical properties of Mg-3Al-1Zn alloy sheets by optimizing the extrusion die angles: Microstructural and texture evolution
Improved mechanical properties of Mg-3Al-1Zn alloy sheets by optimizing the extrusion die angles: Microstructural and texture evolution
复制标题
通过优化挤压模具角度提高 Mg-3Al-1Zn 合金板的机械性能:微观结构和织构演变
DOI:
10.1016/j.jallcom.2018.05.083
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发表时间:
2018-09
影响因子:
6.2
通讯作者:
Pan Fusheng
中科院分区:
文献类型:
--
作者:
Xu Jun;Yang Tianhao;Jiang Bin;Song Jiangfeng;He Junjie;Wang Qinghang;Chai Yangfu;Huang Guangsheng;Pan Fusheng
Mg-3Al-1Zn (AZ31) alloy sheets fabricated using extrusion dies with angles of 30°, 45°, 60° and 90° were investigated. Finite element method was used to analyze the effective strain distribution in AZ31 Mg alloy during extrusion. The microstructure, texture and final mechanical properties were determined and compared among various extruded AZ31 sheets. Results demonstrated that the difference of effective strain was introduced during extrusion due to the variation in die angles. In the case of the 45° extrusion die, a large difference in effective strain along normal direction could form during sheet forming, which resulted in a uniform microstructure and weak basal texture of extruded AZ31 sheet. Therefore, the sheet processed using 45° extrusion die showed lower yield strength andr-value, but higher ductility andn-value. This study suggested that optimization of extrusion die angle could be an effective method to improve the mechanical properties of AZ31 Mg alloy sheets.
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