Microstructure and mechanical properties of AZ91D magnesium alloy prepared by compound extrusion

Microstructure and mechanical properties of AZ91D magnesium alloy prepared by compound extrusion
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复合挤压制备AZ91D镁合金的显微组织与力学性能

DOI:
10.1016/j.msea.2011.01.028
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发表时间:
2011-04
影响因子:
6.4
通讯作者:
ZHAO Z D
ZHAO Z D
中科院分区:
材料科学1区
文献类型:
--
作者:
CHEN Qiang;ZHAO Z X;SHU D Y;ZHAO Z D

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在常规挤压和等通道转角挤压(ECAE)的基础上,提出了一种新的大塑性变形(SPD)方法--复合挤压法,用于制备细晶AZ 91 D镁合金。当累积应变增加到9.146时,获得了6μm的细晶组织。经复合挤压处理的AZ 91 D镁合金具有良好的力学性能,屈服强度为202.2MPa,抗拉强度为323.1MPa,断裂伸长率为14.8%。AZ 91 D镁合金经复合挤压处理后,其良好的力学性能是由于晶粒细化和金属间化合物颗粒分布均匀所致。复合挤压技术的成功开发,为铸态镁合金获得良好的力学性能提供了良好的发展机遇。
Based on conventional extrusion and equal channel angular extrusion (ECAE), a new severe plastic deformation (SPD) method called compound extrusion is developed to fabricate fine-grained AZ91D magnesium alloys. The fine grain size of 6μm is obtained as the accumulated strain increased to 9.146. The AZ91D alloy treated by compound extrusion exhibits good mechanical properties, with a yield strength of 202.2MPa, a tensile strength of 323.1MPa and an elongation to fracture of 14.8%. The good mechanical properties of AZ91D alloy treated by compound extrusion are due to grain refinement and to the homogeneous distribution of intermetallic particles. The success in development of compound extrusion proves that compound extrusion can offer a good opportunity for the development of good mechanical properties of as-cast magnesium alloys.
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