Investigation of the Effect of Ultrasonic Peening on High-Temperature Erosion Resistance

In recent years, surface modification methods have attracted considerable attention in scientific research and advanced industries as effective approaches for improving performance and enhancing the efficiency of engineering components. One of the emerging technologies in this field is ultrasonic peening, which, through the application of repeated high-frequency impacts to the surface, leads to improvements in the physical, mechanical, and even chemical properties of materials. In the present study, the effect of ultrasonic peening treatment on the erosion behavior of A۳۵۶ aluminum alloy was investigated at different temperatures. Solid particle erosion tests were conducted over a temperature range from room temperature to ۳۰۰ °C and at impact angles of ۳۰° and ۹۰°. The results showed that, contrary to initial expectations, ultrasonic peening increased the weight loss at all temperatures. Specifically, at room temperature and a ۹۰° impact angle, the weight loss of the peened samples was ۰.۵۵ mg higher than that of the untreated samples. This trend continued at ۱۰۰ °C. However, at ۲۰۰ °C and ۳۰۰ °C and a ۹۰° impact angle, the weight loss of the peened samples decreased, while that of the untreated samples increased. These findings can be attributed to excessive hardening, increased dislocation density, and the presence of compressive residual stresses, which reduce toughness, refine the surface grain structure, and ultimately promote a more brittle response under high-pressure impacts. Overall, the results indicate that optimization of ultrasonic peening parameters is essential to achieve a genuine improvement in the high-temperature erosion resistance of A۳۵۶ alloy.

کلیدواژه ها:

Ultrasonic Peening ، Aluminum Alloy ، Erosion ، High-Temperature