The tensile deformation and fracture behavior of a magnesium alloy nanocomposite reinforced with nickel
The tensile deformation and fracture behavior of a magnesium alloy nanocomposite reinforced with nickel
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DOI：
10.12989/amr.2012.1.3.169
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发表时间：
2008-08
期刊：
影响因子：
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通讯作者：
T. Srivatsan;K. Manigandan;C. Godbole;M. Paramsothy;M. Gupta
中科院分区：
文献类型：
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作者：
T. Srivatsan;K. Manigandan;C. Godbole;M. Paramsothy;M. Gupta
研究了微米级Ni颗粒增强对纳米Al 2 O3颗粒增强AZ 31镁合金复合材料显微组织、显微硬度、拉伸性能和拉伸断裂行为的影响。将未增强的镁合金（AZ 31）和增强的纳米复合材料对应物（AZ 31/1.5体积% /1.5体积% Ni]通过固化处理然后热挤压来制造。镍颗粒增强镁合金纳米复合材料的弹性模量和屈服强度均高于未增强镁合金和未增强镁合金纳米复合材料（AZ 31/1.5体积% ).镍颗粒增强复合材料的极限拉伸强度明显低于未增强纳米复合材料和整体合金（AZ 31）。的延展性，量化的断裂伸长率，增强的纳米复合材料是明显高于未增强的纳米复合材料和单片合金。这种新型材料的拉伸断裂行为基本上是正常的远场应力轴，并揭示了微观特征，让人想起发生局部韧性失效机制在精细微观水平。
In this paper the intrinsic influence of micron-sized nickel particle reinforcements on microstructure, micro-hardness tensile properties and tensile fracture behavior of nano-alumina particle reinforced magnesium alloy AZ31 composite is presented and discussed. The unreinforced magnesium alloy (AZ31) and the reinforced nanocomposite counterpart (AZ31/1.5 vol.% /1.5 vol.% Ni] were manufactured by solidification processing followed by hot extrusion. The elastic modulus and yield strength of the nickel particle-reinforced magnesium alloy nano-composite was higher than both the unreinforced magnesium alloy and the unreinforced magnesium alloy nanocomposite (AZ31/1.5 vol.% ). The ultimate tensile strength of the nickel particle reinforced composite was noticeably lower than both the unreinforced nano-composite and the monolithic alloy (AZ31). The ductility, quantified by elongation-to-failure, of the reinforced nanocomposite was noticeably higher than both the unreinforced nano-composite and the monolithic alloy. Tensile fracture behavior of this novel material was essentially normal to the far-field stress axis and revealed microscopic features reminiscent of the occurrence of locally ductile failure mechanisms at the fine microscopic level.