Scholarlink

<p>This study explores recycling AA6061 small machining chips via powder metallurgy to fabricate AA6061 aluminum matrix composites (AMCs) reinforced with 0.0, 2.5, 3.75, and 7.5% wt. of CaSiO<sub>3</sub> particles. Before processing, the tiny aluminum chips were characterized to ensure their suitability for powder metallurgy. The microstructures of the AA6061/CaSiO<sub>3</sub> composite samples were characterized using optical and electron microscopies, energy-dispersive x-ray spectroscopy, x-ray diffraction, Rietveld refinement, thermal analysis, microhardness, and compression testing. The microstructure of the composites consisted of the AA6061 matrix with CaSiO<sub>3</sub> particles mostly clustered at grain boundaries. Transmission electron microscopy revealed an Al<sub>ss</sub> substructure in the AA6061 matrix, characterized by a very low-volume fraction of coarse Mg-Si and AlFeSi precipitates and dispersoids after sintering. Incorporation of CaSiO<sub>3</sub> significantly increased microhardness. Besides, the samples showed good thermal stability. This sustainable approach demonstrates the feasibility of producing near-net shape components with enhanced properties.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microstructure and Properties of Sustainable Aluminum Matrix Composites from Solid-State Recycling of AA6061 Chip Waste

  • 期刊论文

  • 发表日期：

    2025年10月29日

查看全文
  • O. Hernández-Negrete,
  • D. A. Blanchet-Sanchez,
  • J. Hernández-Paredes,
  • H. E. Esparza-Ponce,
  • F. Brown-Bojórquez,
  • V. E. Alvarez-Montaño,
  • M. A. Encinas-Romero

摘要

This study explores recycling AA6061 small machining chips via powder metallurgy to fabricate AA6061 aluminum matrix composites (AMCs) reinforced with 0.0, 2.5, 3.75, and 7.5% wt. of CaSiO3 particles. Before processing, the tiny aluminum chips were characterized to ensure their suitability for powder metallurgy. The microstructures of the AA6061/CaSiO3 composite samples were characterized using optical and electron microscopies, energy-dispersive x-ray spectroscopy, x-ray diffraction, Rietveld refinement, thermal analysis, microhardness, and compression testing. The microstructure of the composites consisted of the AA6061 matrix with CaSiO3 particles mostly clustered at grain boundaries. Transmission electron microscopy revealed an Alss substructure in the AA6061 matrix, characterized by a very low-volume fraction of coarse Mg-Si and AlFeSi precipitates and dispersoids after sintering. Incorporation of CaSiO3 significantly increased microhardness. Besides, the samples showed good thermal stability. This sustainable approach demonstrates the feasibility of producing near-net shape components with enhanced properties.