Effects of Impact Angles on Erosion-Abrasion Properties of Hypereutectic Al-Mn Alloy Matrix Composite Reinforced with Al₂O₃ Particulates

Abstract:

Effects of different impact angles such as 45°and 90°on the erosion-abrasion properties of hypereutectic Al-Mn alloy and its composites reinforced with Al₂O₃ particulates were studied by rotating erosion-abrasion test, and the microstructure and the worn surfaces were analyzed. The results show that the as-cast Al-Mn alloy is composed of aluminium-manganese solid solution, MnAl₆ and Al₁₁Mn₄ phase, while the δ-Al₂O₃ particles are included in the composites besides the aforementioned microstructures. With elongating the erosion time, the wear rates of the Al-Mn alloy and its composites increase at the impact angle of 90°, whereas they firstly increase and then decrease , and there is a maximum at 45°. The distortion wear caused by the normal stress is dominant at 90°, which lead to the erosion pits on the worn surface. However, the cutting wear by the shear stress is predominant at 45°, which result in the ploughs.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 190-193
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.190
• Online since: February 2011
• Authors: Bing Liu, Xin Mei Li, Xiang Liu, Chun Yao Wang
• Keywords: Composites Reinforced with Particulate, Erosion-Abrasion, Hypereutectic Al-Mn Alloy, Impact Angle

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