Effects of Impact Angles on Erosion-Abrasion Properties of Hypereutectic Al-Mn Alloy Matrix Composite Reinforced with Al2O3 Particulates
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.
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
B. Liu et al., "Effects of Impact Angles on Erosion-Abrasion Properties of Hypereutectic Al-Mn Alloy Matrix Composite Reinforced with Al2O3 Particulates", Advanced Materials Research, Vols. 194-196, pp. 190-193, 2011