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The production of aluminum alloys using the near net shape and cost-effective powder metallurgy (PM) route results in excellent microstructure and properties. This fact has led to extensive use of aluminum PM parts in the automotive and aerospace industries. In many cases, as-sintered parts may need further mechanical surface treatment to ensure the highest size precision. This can cause alterations in surface topography and wear behavior of aluminum. This study concentrates on the effect of sizing on the tribological properties of aluminum PM parts after applying sizing using different loads. Microhardness, wear resistance, and the coefficient of friction were measured and studied. Scanning electron microscopy (SEM) and confocal scanning laser microscopy were used to analyze the wear tracks. The results showed an increase in the wear rate in the sized samples. Also, sizing mechanical surface treatment resulted in enhancing the hardness in the aluminum PM parts.

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Tribological Response of Alumix 123 Powder Metallurgy Alloy after Sizing Mechanical Surface Treatment

  • 会议论文

  • 发表日期：

    2025年

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  • Nima Valizade,
  • George Jarjoura,
  • Georges J. Kipouros

摘要

The production of aluminum alloys using the near net shape and cost-effective powder metallurgy (PM) route results in excellent microstructure and properties. This fact has led to extensive use of aluminum PM parts in the automotive and aerospace industries. In many cases, as-sintered parts may need further mechanical surface treatment to ensure the highest size precision. This can cause alterations in surface topography and wear behavior of aluminum. This study concentrates on the effect of sizing on the tribological properties of aluminum PM parts after applying sizing using different loads. Microhardness, wear resistance, and the coefficient of friction were measured and studied. Scanning electron microscopy (SEM) and confocal scanning laser microscopy were used to analyze the wear tracks. The results showed an increase in the wear rate in the sized samples. Also, sizing mechanical surface treatment resulted in enhancing the hardness in the aluminum PM parts.