Bambang Suharno Department Metallurgy and Materials, Faculty of Engineering, University of Indonesia Kampus UI, Depok 16424 Indonesia
Is Prima Nanda Mechanical Engineering Department, University of Andalas Kampus Limau Manis, Padang 25163 Indonesia
Sri Harjanto Department Metallurgy and Materials, Faculty of Engineering, University of Indonesia Kampus UI, Depok 16424 Indonesia
Erika Lirachandra Department Metallurgy and Materials, Faculty of Engineering, University of Indonesia Kampus UI, Depok 16424 Indonesia