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首页> 外文会议>Powder metallurgy world congress amp; exhibition >Properties of the AZ91 Mg-alloy Produced by Spark Plasma Sintering
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Properties of the AZ91 Mg-alloy Produced by Spark Plasma Sintering

机译：等离子烧结生产AZ91镁合金的性能

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摘要

In the present investigation, the microstructural characterization of the AZ91 Mg-alloy produced by Spark Plasma Sintering (SPS) and the evaluation of its hot compression behaviour has been carried out. Two SPS cycles were investigated; the first up to 400 °C and the second up to 450 °C. The specimens were characterized with respect to their microstructure, density, hardness, microhardness and phase composition. For the evaluation of the hot deformability, uniaxial compression tests for a 40% reduction in length were performed at different temperatures. It has been obtained that both SPS cycles produce samples with 99% of densification. In addition, the samples presented a different content in the embrittling Mg_17Al_12 phase, about 22.1% in the samples produced at 400cC and 7.1% in the others. For both types of sample, the results of the hot compression tests are quite promising, but the content of the embrittling phase has to be reduced and the sintering degree has to be increased, in order to improve the surface quality of specimens after hot compression.
机译：在本研究中，已经进行了火花等离子烧结（SPS）生产的AZ91镁合金的显微组织表征及其热压缩行为的评估。研究了两个SPS周期；第一个温度高达400°C，第二个温度高达450°C。对样品的微观结构，密度，硬度，显微硬度和相组成进行表征。为了评估热变形性，在不同温度下进行了长度减少40％的单轴压缩试验。已经获得两个SPS循环产生具有99％的致密化的样品。另外，样品在脆化Mg_17Al_12相中呈现出不同的含量，在400℃下生产的样品中约占22.1％，其他样品中占7.1％。对于这两种类型的样品，热压缩测试的结果都是很有希望的，但是必须减少脆化相的含量，并且必须提高烧结度，以改善热压缩后的样品表面质量。

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