Work hardening behavior of Mg-based nano-composites strengthened by Al2O3 nano-particles
Work hardening behavior of Mg-based nano-composites strengthened by Al2O3 nano-particles
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DOI：
10.1016/j.msea.2012.12.083
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发表时间：
2013-04
期刊：
影响因子：
6.4
通讯作者：
Mahdi Habibnejad-korayem;R. Mahmudi;W. Poole
中科院分区：
文献类型：
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作者：
Mahdi Habibnejad-korayem;R. Mahmudi;W. Poole
研究了含纳米al2o3颗粒Mg和AZ31镁合金的加工硬化行为。位错与不可剪切纳米颗粒的相互作用被认为是纳米复合材料加工硬化的控制机制。Mg-基材和az31基材的不同初始加工硬化速率与其先前的热机械历史有关。与无颗粒复合材料相比，纳米复合材料具有更高的加工硬化率和更低的动态恢复率。为了更好地理解纳米复合材料加工硬化的控制机制，本文还讨论了纳米颗粒对加工硬化能力的双边影响，这种影响是由纳米颗粒潜在的晶粒细化能力和容纳位错引起的。
The work hardening behavior of Mg and AZ31 Mg alloy containing nano-sized Al2O3particles was studied. Interaction of dislocations with non-shearable nano-particles was considered as the governing mechanism of work hardening in the nano-composites. Different initial work hardening rates in Mg- and AZ31-base materials were correlated to their previous thermo-mechanical history. In comparison with the particle-free samples, nano-composites had all higher levels of work hardening rate and lower rate of dynamic recovery. The bilateral effects of nano-particles on work hardening capacity, caused by their potential grain refining capability and accommodating dislocations, are also discussed for a better understanding of the governing mechanisms in work hardening of the present nano-composite materials.