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Heat treatment effect on the damping capacities of Mg2Si/AZ91D composites

机译:热处理对Mg2Si/AZ91D复合材料阻尼能力的影响

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摘要

10 wt of fly ash cenospheres (FAC) powder fragments with average size of 200 mu m were added to the AZ91D Mg alloy slurry to prepare Mg2Si/AZ91D composites by stirring casting method. Then solution treatment was carried out for the composites. The effects of the solution treatment at 420 degrees C on the morphology of Mg2Si particles and damping capacities were discussed. The results showed that after the solution treatment, the distribution of Mg2Si particles in the composite becomes more uniform, and the damping capacities are higher than those of as-cast composite. The results of damping capacity revealed that damping of composites at room temperature is dependent on strain, and can be explained by G-L dislocation theory. At elevated temperatures, interface damping becomes a new contributor to the damping capacity. After the solution treatment, the distribution of Mg2Si particles in the composite becomes more uniform, and the damping capacities are higher than those of as-cast composite.
机译:在AZ91D镁合金浆料中加入10 wt%平均粒径为200 μ m的粉煤灰粉碎,采用搅拌铸造法制备Mg2Si/AZ91D复合材料。然后对复合材料进行固溶处理。讨论了420°C固溶处理对Mg2Si颗粒形貌和阻尼能力的影响。结果表明,固溶处理后,复合材料中Mg2Si颗粒的分布更加均匀,阻尼能力高于铸态复合材料。阻尼能力结果表明,复合材料在室温下的阻尼取决于应变,可以用G-L位错理论来解释。在高温下,界面阻尼成为阻尼能力的新贡献者。固溶处理后,复合材料中Mg2Si颗粒的分布更加均匀,阻尼能力高于铸态复合材料。

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