The cavitation strengthening test of Aluminum lithium Alloy (8090Al–Li) was carried out with different pressure process parameters. The roughness, residual stress, and morphology of the treated samples were studied. A high dislocation density was formed in the cavitation area of the workpiece, which resulted in surfacing hardening. The cavitation effect occurred in the collapse area. It was beneficial for the process to be the right choice for the surface treatment of metal materials. The results confirmed that surface roughness, grain size, micro-strain, erosive effect, and micro-hardness of the alloy were significantly affected by different cavitation peening pressures. In this case, surface roughness increased as the impact pressure increased. Besides, the microcrystalline structure decreased in the cavitation treatment area. The study showed on how the impact of the different cavitation peening pressure could suppress the material surfaces, the compressive residual stress, attained the maximum values of −137 MPa to −162 MPa, which increased from 7.87 to 27.56%, as compared to the original sample. In contrast, the corresponding surface roughness average increased to 3.04 μm. Experimental observation shows that the cavitation collapse boundaries obtained by the proposed sample surface and metallographic images were highly complete and accurate.

中文翻译：

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8090Al-Li合金空化水射流强化处理的表面特性及空化损伤

采用不同压力工艺参数对铝锂合金（8090Al-Li）进行空化强化试验。研究了处理后样品的粗糙度、残余应力和形貌。工件空化区形成高位错密度，导致表面硬化。空化效应发生在塌陷区。该工艺有利于成为金属材料表面处理的正确选择。结果表明，不同的空化喷丸压力对合金的表面粗糙度、晶粒尺寸、微应变、侵蚀效应和显微硬度有显着影响。在这种情况下，表面粗糙度随着冲击压力的增加而增加。此外，空化处理区域的微晶结构减少。研究表明，不同空化喷丸压力的影响如何抑制材料表面，残余压应力达到最大值-137 MPa到-162 MPa，与原来相比，从7.87%增加到27.56%样本。相比之下，相应的表面粗糙度平均值增加到 3.04 μm。实验观察表明，所提出的样品表面和金相图像获得的空化坍塌边界高度完整和准确。04微米。实验观察表明，所提出的样品表面和金相图像获得的空化坍塌边界高度完整和准确。04微米。实验观察表明，所提出的样品表面和金相图像获得的空化坍塌边界高度完整和准确。