Study of kerf features on CFRP/UNS A97075 stacks machined by AWJM

Abstract

Thought it is proven by several authors that conventional machining causes several damages when a stack of composite material and metallic material is machined, few studies have been carried out about the possible alternatives. On this report, Abrasive Water Jet Machining (AWJM) is used to machine stacks of CFRP/UNS A97075 and UNS A97075/CFRP. Related machining aspect such as kerf taper and other AWJM features are analyzed over the machined materials. It is discussed the veracity of the usual way to evaluate Kerf Taper. Both Stereoscopic Optical Microscopy (SOM) and Scanning Electron Microscopy (SEM) techniques are applied along the evaluation. Finally, not delamination is detected however it is clear to say that depending on the configuration of the stack, transport and inclusion of CFRP in the UNS A97075 will appear, and abrasive particles will be found, to a greater or lesser extent.