Effect of process parameters of Plain Water Jet on the cleaning quality, surface and material integrity of Inconel 718 milled by Abrasive Water Jet

Abrasive Water Jet (AWJ) is considered as a promising milling method for difficult-to-machine aeronautical materials Inconel alloy 718 (IN718). However, grit embedment during AWJ known detrimental effect on certain applications aircraft repair, where surface condition may play an important role additive material technologies. To overcome this problem, Plain (PWJ) has been used in the present study cleaning process and demonstrated to be effective remove particles from with marginal alterations of state. In paper, firstly influence parameters abrasive texture IN718 specimens milled by were addressed. Then these surfaces subjected PWJ extensively characterized terms embedment, roughness, erosion depth, microhardness residual stresses. Before cleaning, presented level varying between 7 % 14 %. One setting was selected performing which reduced up quarter initial total area (less than 4 all cleaned surfaces) without relatively modifying neither nor depth. Comparable gradients observed before after corresponded ∼ 30 higher bulk values at then decreased beneath 200 µm reach value (∼ 245 HV). Compressive stress state initially induced some remained unchanged but other ones slightly relieved 50 MPa). Residual stresses resulted − 630 MPa – 315 depending parameters.