This article considers effects of local heat transfer taking place insteel cutting by abrasive water jet machining (AWJM). The influence of temperature changes during AWJM has not been investigated thoroughly. Most studies on AWJM suggest that thermal energy has little or no effect on the material cut. This study focused on the analysis of the material microstructure and indentation microhardness in the jet impact zone and the adjacent area. The structure features revealed through optical metallography and scanning microscopy suggest local temperature changes caused by the impact of the abrasive water jet against the workpiece surface. From the microscopic examinationand hardness tests, it is clear that, during the process, large amounts of energy were transferred locally. The mechanical stress produced by the water jet led to plastic deformation at and near the surface. This was accompanied by the generation and transfer of large amounts of heat resulting in a local rise in temperature to 450 °C or higher.

Department of Materials Science and Materials Technology Faculty of Mechatronics and Mechanical Engineering Kielce University of Technology al Tysiąclecia Państwa Polskiego 7 25 314 Kielce Poland

Department of Physics Faculty of Electrical Engineering and Computer Science VSB Technical University of Ostrava 17 Listopadu 2172 15 70800 Ostrava Poruba Czech Republic

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Temperature Measurement during Abrasive Water Jet Machining (AWJM)