Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 5 (2018) 9615–9623 www.materialstoday.com/proceedings 2214-7853 © 2017 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of The 10th Thailand International Metallurgy Conference. The 10 th Thailand International Metallurgy Conference (The 10 th TIMETC) Effect of initial microstructure on induction heating of A319 aluminium alloy Nattapon Kesangam a , Supree Pinitsoontorn a , Sompong Srimanosaowapak b, * a Department of Physics, Faculty of Science, Khonkaen University, Khonkaen, Thailand b MTEC, National Science and Technology Development Agency (NSTDA) 114 Thailand Science Park, Thanon Phahonyothin, Tambon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand Abstract Induction heating finds applications in metal manufacturing processes where high energy efficiency and short heating time are required. Since heat is directly induced within a workpiece by circulating eddy currents and hysteresis, the high energy efficiency of induction heating would be obtained with high resistivity and magnetic materials. In this work, influence of initial microstructure on induction heating of A319 aluminium alloy was investigated in order to understand the induction heating phenomenon of non-magnetic materials. Billets with dendritic and globular grain structure were heated to different temperatures in a simple helical wound coil using an induction furnace. Heat induced in the billets was measured using a calorimetry method. Noticeably higher heat content was found in the dendritic grain structure billets with all investigated induction heating temperatures. Possible reasons of this difference in heating behavior of the differently initial microstructure billets were discussed © 2017 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of The 10th Thailand International Metallurgy Conference. Keywords: A319 aluminium alloy; Induction heating; Initial microstructure; Resistivity 1. Introduction Induction heating has been widely employed in a wide range of important metal manufacturing processes such as surface hardening, melting, brazing, soldering and heating to fit. It encounters a requirement for more efficient and cost effective operation in order to reduce manufacturing cost [1-3]. In general, the power required for induction * Corresponding author. Tel.: +66 2 564 6500; fax: +66 2 564 6501. E-mail address: sompongs@mtec.or.th