论文部分内容阅读
采用激光冲击工艺处理6061-T6铝合金,研究了二氧化硅砂对其侵蚀磨损性能的影响。其中冲击角为15°、30°、60°、90°,粒子速率为37和58 m/s,采用两种激光进行辐照。采用3D轮廓测量法表征了侵蚀形貌,并采用SEM研究其侵蚀机理。结果表明,冲击角较小时,侵蚀磨损最大。侵蚀强度和侵蚀机理不受激光冲击工艺的影响,而与侵蚀的高应变速率有关。侵蚀图之间的差异是由于激光冲击工艺造成的表面粗糙度不同。最大质量损失和最大侵蚀深度分别出现在冲击角度为15°和30°时。最后,发现了明显的侵蚀机理的转移,从低角度的切割机制到90°时的凹坑形成。
The effects of silica sand on the erosion and wear properties of 6061-T6 aluminum alloy were investigated by laser shock process. The impact angles were 15 °, 30 °, 60 ° and 90 °, and the particle velocities were 37 and 58 m / s, respectively. Two kinds of lasers were used for irradiation. The eroded morphology was characterized by 3D profilometry, and its erosion mechanism was studied by SEM. The results show that when the impact angle is small, erosion wear is the largest. The erosion intensity and erosion mechanism are not affected by the laser shock process, but are related to the high strain rate of erosion. The difference between the erosion patterns is due to the different surface roughness caused by the laser impact process. The maximum mass loss and the maximum erosion depth occur at an impact angle of 15 ° and 30 °, respectively. Finally, significant shifts in erosion mechanisms were found, from low-angle cutting mechanisms to dimple formation at 90 °.