Title: Mathematical modelling on multiple variables in machining LaPO4/Y2O3 composite by abrasive waterjet

Authors: K. Balamurugan; M. Uthayakumar; S. Sankar; U.S. Hareesh; K. Gopakumar K. Warrier

Addresses: Faculty of Mechanical Engineering, Kalasalingam University, Krishnankoil-626 126, India ' Faculty of Mechanical Engineering, Kalasalingam University, Krishnankoil-626 126, India ' Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram-695019, India ' Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram-695019, India ' Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram-695019, India

Abstract: Abrasive water jet machine (AWJM) cutting technology is used to process many engineering materials which have low toughness and poor thermal conductive property. In this study, LaPO4/Y2O3 ceramic composite, that possesses no phase transformation at high operating temperature and good thermal barrier material, is used. AWJM with garnet of 80 mesh size as abrasive is characterised with various process parameters. Here, material removal rate (MRR), kerf angle (KA) and surface finish (Ra) are investigated by using the three influencing parameters such as jet pressure (JP), stand-off distance (SOD) and traverse speed (TS). L27 orthogonal array is used to record the experimental observations. The empirical model is developed by multilinear regression analysis (MRA) for MRR, KA and Ra. Analysis of variance (ANOVA) and response tables show the influences and the contribution of each independent variable over the dependent response.

Keywords: abrasive waterjet; LaPO4/Y2O3 composite; material removal rate; MRR; kerf angle; surface finish; regression analysis; process correlation.

DOI: 10.1504/IJMMM.2017.087616

International Journal of Machining and Machinability of Materials, 2017 Vol.19 No.5, pp.426 - 439

Received: 05 Jul 2016
Accepted: 25 Dec 2016

Published online: 20 Oct 2017 *

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