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首页> 外文期刊>Journal of Materials Engineering and Performance >Mechanical Properties and Microstructural Evolution of Yb-Modified Al-20%Si Alloy
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Mechanical Properties and Microstructural Evolution of Yb-Modified Al-20%Si Alloy

机译：YB改性Al-20％Si合金的机械性能和微观结构演化

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摘要

In the study, the mechanical properties and microstructural evolution of hypereutectic Al-20%Si-xYb alloys (x = 0, 0.1, 0.3, 0.5 and 0.7 wt.%) were studied. The as-prepared samples were characterized by scanning electron microscopy, optical microscope, x-ray diffraction (XRD) and electron probe microanalysis. The characterization results showed with the addition amount of Yb increasing to 0.5%, the eutectic Si structure was gradually modified from coarse needle-like/platelet-like structure into fine coral-like fibrous structure and the primary Si phases were gradually converted from coarse platelet-like/star-like/polygonal shape into fine blocky shape. In particular, according to the results of WDS and XRD analyses, the Yb-rich intermetallic phase in the Al-20%Si alloy is Al3Yb. Tensile test was carried out to study the mechanical properties of Al-20%Si-x%Yb alloys, and results showed that the elongation and ultimate tensile strength increased by 73.6% and 64.5%, respectively.
机译：在研究中，研究了过度酯-20％Si-XYB合金的机械性能和微观结构演化（X = 0,0.1,0.3,0.5和0.7重量％）。 通过扫描电子显微镜，光学显微镜，X射线衍射（XRD）和电子探针微分析，表征了如制备的样品。 表征结果表明，随着Yb的增加量增加至0.5％，将共晶Si结构从粗针/片状结构逐渐修饰成细珊瑚状的纤维结构，初级Si阶段从粗血小板逐渐转换 - 样/星形/多边形形状成细块状。 特别地，根据WDS和XRD分析的结果，Al-20％Si合金中富含Yb的金属间相是Al3YB。 进行拉伸试验以研究Al-20％Si-X％YB合金的机械性能，结果表明，伸长和最终拉伸强度分别增加了73.6％和64.5％。

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