High‐Temperature Tensile and Compressive Behavior of Peak‐Aged Sand‐Cast Mg–10Gd–3Y–0.5Zr Alloy
High‐Temperature Tensile and Compressive Behavior of Peak‐Aged Sand‐Cast Mg–10Gd–3Y–0.5Zr Alloy
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DOI：
10.1002/adem.201500367
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发表时间：
2016-04
影响因子：
3.6
通讯作者：
Xiangjun Chen;Wencai Liu;Guohua Wu;Yanlei Li;Zhong-quan Li;Song Zhang;W. Ding
中科院分区：
文献类型：
--
作者：
Xiangjun Chen;Wencai Liu;Guohua Wu;Yanlei Li;Zhong-quan Li;Song Zhang;W. Ding
研究了峰值时效砂型铸造Mg-10 Gd-3 Y-0.5Zr合金在25 ~ 250 °C范围内的单轴拉伸和压缩行为。结果表明，与其它镁合金相比，该合金具有优异的高温拉伸和压缩性能。当试验温度从25 ° C升高到150 °C时，拉伸屈服应力和极限拉伸强度保持不变，而压缩屈服强度略有增加。这是由于合金中存在亚稳β′（cbco）相和良好的高温塑性所致。该合金表现出拉伸-压缩屈服不对称性，这可能与锥体滑移和拉伸孪晶有关。此外，还系统地研究了该合金在不同温度下的断裂机制。
The uniaxial tensile and compressive behavior of the peak‐aged sand‐cast Mg–10Gd–3Y–0.5Zr alloy from 25 to 250 °C is investigated. The results show that the alloy exhibits excellent high‐temperature tensile and compressive properties compared with other magnesium alloys. The tensile yield stress and ultimate tensile strength remain unchanged, while the compressive yield strength slightly increases when testing temperature rises from 25 to 150 °C. This can be attribute to the metastable β′(cbco) phase and the fine ductility of the alloy at high temperature. The alloy shows tension‐compression yield asymmetry which could be associated to the pyramidal slip and extension twinning. In addition, the fracture mechanisms of the tested alloy at different temperatures are studied systematically.