This work deals with the effect of grit blasting on the surface and in-depth properties of a number of commercially available metals/alloys, i.e., low carbon steel, C45 steel, SS316, Ti-6Al-4V, Inconel 718, and Hastelloy X. The residual stress depth profile and dislocation density of the specimens were determined using X-ray diffraction. A substantial increase in dislocation density was observed after grit blasting. A transmission electron microscope was utilized to observe the dislocation structure in a grit-blasted specimen. Strain hardening was also observed at the blasted surface owing to dislocation interaction and entanglement. The hardness profile followed a trend similar to that of dislocation density along the depth of grit-blasted low carbon steel. Moreover, compressive residual stress is induced in the blasted surface having a maximum value at a certain depth. The maximum induced compressive residual stress was found to have a good correlation with the Johnson–Cook flow stress. Moreover, the depth of the affected layer and the increase in hardness were found to depend on the yield strength and the strain hardening exponent of the materials, respectively. A plastic deformation-induced phase transformation from austenite to martensite was also identified in the case of SS316.

这项工作涉及喷砂处理对许多市售金属/合金的表面和深层特性的影响，即，低碳钢，C45钢，SS316，Ti-6Al-4V，Inconel 718和HastelloyX。使用X射线衍射确定样品的残余应力深度分布和位错密度。喷砂后观察到位错密度显着增加。利用透射电子显微镜观察喷砂处理试样的位错结构。由于位错相互作用和纠缠，在喷砂表面也观察到应变硬化。硬度分布遵循与喷砂低碳钢深度上的位错密度相似的趋势。而且，在一定深度处在最大值处的喷砂表面中产生压缩残余应力。发现最大诱导压缩残余应力与Johnson-Cook流动应力具有良好的相关性。此外，发现受影响层的深度和硬度的增加分别取决于材料的屈服强度和应变硬化指数。在SS316的情况下，还发现了塑性变形引起的从奥氏体到马氏体的相变。