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用金相和扫描电镜观察等方法观察了尺寸不同的Al-Fe-Ce合金粉末的形貌与组织结构,并通过室温和高温拉伸、高温热暴露等试验对比了由不同粒度的粉末制成的Al-8.32Fe-3.4Ce合金性能及组织。研究结果发现,由细小粉末热挤压成形的试样,室温拉伸强度高达560MPa,而粗大粉末制成的试样强度只有450MPa。两种试样经热暴露后的拉伸性能也有很大差距。这充分表明了反映急冷速度的粉末粒度对合金和组织性能的巨大影响。
Morphology and microstructure of Al-Fe-Ce alloy powders with different sizes were observed by metallography and scanning electron microscopy. The results of tensile and thermal exposure tests at room temperature and high temperature were compared with those of powders with different particle sizes Al-8.32Fe-3.4Ce alloy performance and organization. The results showed that the hot-pressed samples formed by the fine powder had a tensile strength up to 560 MPa at room temperature and the strength of the sample made from coarse powder was only 450 MPa. Tensile properties of the two samples after heat exposure also have a long way to go. This fully demonstrates that the grain size, which reflects the cooling rate, has a great effect on the alloy and microstructure properties.