X-ray Study on Deformation Layer of Aluminum Alloy A5083 of Cutting Surface Using Water Jet

Abstract

X-ray study was made on deformation layer of aluminum alloy A5083 of cutting surface using water jet. Distributions of plastic strain in the deformation layer of the specimen were estimated using integral breadths of X-ray diffraction intensity curves. Two methods were used.
The first method is to obtain the intensity curves every time when the tnin layer of the specimen is chemically polished using 20% NaOH+80% water at 70°C. The other is to use the phenomenon that the penetration depth of X-ray depends on the diffraction planes. Almost the same distributions were obtained in both methods. Plastic strain in the deformation layer decreased exponentially. Plastic strain on the cutting surface increased slightly with increasing water pressure and cutting speed and was between 15 and 44%. The thickness of the deformation layer was between 0.15 and 0.19 mm.