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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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LA41镁合金的PLC效应及其解释
, PP. 191-194
Keywords: 镁合金,PLC效应,动态应变时效
Abstract:
通过单向拉伸实验在LA41镁合金中观察到了PLC(Portevin-LeChatelier)效应．在整个实验的应变速率范围(3.33×10-4-6.66×10-3s-1)内这种塑性不稳定性始终存在．合金的抗拉强度和屈服强度随应变速率的增加而减小,其应变速率敏感系数始终为负值,且该不稳定性总是在一个临界应变之后出现．基于以上特征,运用动态应变时效(dynamicstrainaging,DSA)机制,即形变过程中溶质原子与可动位错的交互作用,解释了所观察到的力学现象．
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