Improvement of ductility at room temperature of Mg-3Al-1Zn alloy sheets processed by equal channel angular pressing
Improvement of ductility at room temperature of Mg-3Al-1Zn alloy sheets processed by equal channel angular pressing
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等通道角冲压加工Mg-3Al-1Zn合金板材室温塑性的提高
DOI：
10.1016/j.proeng.2014.10.183
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
W. Volk
中科院分区：
文献类型：
--
作者：
J. Suh;J. Victoria-Hernandez;D. Letzig;J. Bohlen;W. Volk
研究了ECAP变形温度对Mg-3Al-1 Zn板材组织和力学性能的影响。开发了一种新型的ECAP工具，对200 mm × 200 mm × 1.8 mm的板材进行了ECAP变形，在175、200和225 ℃三个温度下，内通道角为130 o，成功地进行了ECAP变形试验。在ECAP过程之后，在ECAP板材中观察到显著的晶粒细化和织构变化。室温拉伸试验表明，随着变形温度的升高，沿着ECAP变形方向的均匀延伸率增大。最高的均匀应变被发现在17%，使用225 ℃的加工温度。室温拉伸均匀延伸率比原材料提高了31%。
The effect of process temperature on the microstructure and mechanical properties of Mg-3Al-1Zn sheets processed by ECAP is investigated in this work. A novel tool was developed for the implementation of ECAP to deform sheets with dimension of 200 mm × 200 mm × 1.8 mm. ECAP trials were performed successfully at three temperatures of 175, 200 and 225oC using an internal channel angle of 130o. After the ECAP process, significant grain refinement and texture changes were observed in the ECAPed sheets. The tensile tests at room temperature showed that uniform elongation along the direction of ECAP process increases with the process temperature. The highest uniform strain was found at 17% using a processing temperature of 225oC. The tensile uniform elongation at room temperature was improved by 31% in comparison with the as-received material.