Mechanical and Tribological Behaviors of WAl₁₂ Reinforced 2024 Aluminum Alloy Matrix Composites

Abstract:

WAl₁₂ reinforced 2024 aluminum alloy matrix composites were prepared by powder metallurgy with tungsten particles and W₅₀Al₅₀ alloy particles. The effects of WAl₁₂ on the mechanical properties of 2024 aluminum alloy composites at room temperature and high temperature were studied, and the friction behavior was characterized. The results show that intermetallic WAl₁₂ phase forms in the composite by 2024 aluminum alloy and tungsten. The mechanical properties and friction behavior can be improved by the formation of intermetallic WAl₁₂ phase. The tensile strength of 2024 aluminum alloy at room temperature and 180 °C can be improved by adding tungsten less than 1.5 at.%. Adding 2.0 at.% tungsten can reduce the friction coefficient by 20 % and the scratch width by 40 %. The tensile fracture surface of the sample was analyzed by scanning electron microscopy (SEM), indicating that WAl₁₂ intermetallic phase is closely connected with the aluminum matrix.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 60-67
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.60
• Online since: May 2020
• Authors: Jin Hao Wu, You Hong Sun, Qing Nan Meng*, Chi Zhang, Su Su Peng
• Keywords: 2024 Al Matrix Composites, Intermetallic Phase (WAl₁₂), Mechanical Alloying, Powder Metallurgy

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