稀土钕对ZK20镁合金铸态组织和力学性能的影响
发布时间：2019-04-27 07:22
【摘要】：采用常规金相、XRD分析、SEM分析、常温拉伸以及高温压缩实验,研究了稀土Nd对低锌的ZK20镁合金铸态组织和力学性能的影响及机理,分析了ZK20镁合金中含Nd相的类型随Nd含量的变化规律。结果表明随着钕含量的增多,ZK20镁合金铸态组织在枝晶间或晶界上出现了较多的合金相,且随钕添加量的增多,合金中的Mg-Zn-Nd三元合金相数量不断增多,其形态也由不连续的网状逐渐转变为完整的网状形态,合金的断裂方式由穿晶断裂逐渐转变成沿晶断裂。
[Abstract]:The effect and mechanism of rare earth Nd on as-cast microstructure and mechanical properties of ZK20 magnesium alloy with low zinc content were studied by means of conventional metallography, XRD analysis, SEM analysis, room temperature tensile test and high temperature compression test. The variation of the type of Nd phase in ZK20 magnesium alloy with the content of Nd was analyzed. The results show that with the increase of neodymium content, more alloy phases appear in the as-cast microstructure of ZK20 magnesium alloy between dendrites or grain boundaries, and with the increase of neodymium content, the number of Mg-Zn-Nd ternary alloy phases in the alloy increases continuously. The morphology of the alloy gradually changed from discontinuous network to complete network, and the fracture mode of the alloy gradually changed from transgranular fracture to intergranular fracture.
【作者单位】： 重庆市科学技术研究院;重庆大学材料科学与工程学院;
【基金】：国际科技合作资助项目(2011DFR50950,2013DFA71070) 重庆市集成示范计划资助项目(cstc2013jcsf50003) 重庆市科研院所创新能力建设计划资助项目(cstc2012pt-kyys50001)
【分类号】：TG146.22
，
本文编号：2466797
[Abstract]:The effect and mechanism of rare earth Nd on as-cast microstructure and mechanical properties of ZK20 magnesium alloy with low zinc content were studied by means of conventional metallography, XRD analysis, SEM analysis, room temperature tensile test and high temperature compression test. The variation of the type of Nd phase in ZK20 magnesium alloy with the content of Nd was analyzed. The results show that with the increase of neodymium content, more alloy phases appear in the as-cast microstructure of ZK20 magnesium alloy between dendrites or grain boundaries, and with the increase of neodymium content, the number of Mg-Zn-Nd ternary alloy phases in the alloy increases continuously. The morphology of the alloy gradually changed from discontinuous network to complete network, and the fracture mode of the alloy gradually changed from transgranular fracture to intergranular fracture.
【作者单位】： 重庆市科学技术研究院;重庆大学材料科学与工程学院;
【基金】：国际科技合作资助项目(2011DFR50950,2013DFA71070) 重庆市集成示范计划资助项目(cstc2013jcsf50003) 重庆市科研院所创新能力建设计划资助项目(cstc2012pt-kyys50001)
【分类号】：TG146.22
，
本文编号：2466797
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