Abstract

Mechanical alloying is a widely used alternative to the liquid-phase method of embedding reinforcements to manufacture metal matrix composites (MMC). In this research, high-energy ball milling was used to distribute various volume fractions of sub-micron-sized SiC_p particles (2, 10, and 20 vol%) in AA2024 aluminum powder alloy, focusing on powder morphology and milling conditions. An increase in the full width at half-maximum and the shifting of peaks at higher angles were observed after mechanical alloying. These examinations were attributed to changes in the lattice parameters of the matrix alloy. It was noted that the temperature and loading pressure during the die compaction stages of MMC powders directly affect the compact density, whereas the volume fraction of SiC_p changes hardness. Compression testing, conducted at elevated temperatures to evaluate the plastic properties of the material, showed sufficient ductility characteristics for thermomechanical processing.

Graphic Abstract

中文翻译：

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机械合金化制备AA2024 / SiC p金属基复合材料

摘要

机械合金化是埋入增强材料以制造金属基复合材料（MMC）的液相方法的一种广泛使用的替代方法。在这项研究中，高能球磨用于在AA2024铝合金粉末中分布各种体积分数的亚微米级SiC _p颗粒（2、10和20 vol％），重点关注粉末的形貌和研磨条件。机械合金化后，观察到半峰全宽的增加和高角度处峰的移动。这些检查归因于基体合金的晶格参数的变化。值得注意的是，MMC粉末压实阶段的温度和加载压力直接影响压实密度，而SiC _p的体积分数改变硬度。在高温下进行的压缩测试（用于评估材料的塑性）表明，热机械加工具有足够的延展性。

图形摘要