Effect of Co Addition to Heat- Treated P/M 316L Stainless Steel on α′-Martensite Formation and Mechanical Properties

Nantawan Pichaiwong, born in 1987, is graduate student at the Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Thailand. She received a bachelor degree in metallurgical engineering from Chulalongkorn University, Thailand in 2010. Her research scope is related to development and characterizations of stainless steels at high temperatures.

Panyawat Wangyao, a corresponding author, received PhD (physical metallurgy) from Technical University, Kosice, Slovakia in 2002. He is lecturer and serving as head of Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Thailand, since 2011. His research areas of expertise include high temperature materials such as superalloys, superceramics, and supercomposites including superstainless steels as well as powder metallurgy of alloys.

Gobboon Lothongkum, a corresponding author, born 1960, is associate professor at Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Thailand. He received Dr.-Ing. degree from University of the Federal Armed Force Hamburg, Germany in 1994 and the International Welding Engineer Certificate of The International Welding Institute in 2006. His areas of expertise include corrosion of metals and alloys, welding and metal joining, high temperature materials and stainless steels.

Patama Visuttipitukul, PhD (metallurgy) from the University of Tokyo, Japan in 2003, is assistant professor at Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Thailand. She received bachelor and master degrees in metallurgical engineering from Chulalongkorn University, Thailand in 1998 and 2000. She received also the International Welding Engineer Certificate of The International Welding Institute in 2006. Her areas of expertise include Surface treatment, heat treatment and thin film.

Seksak Asavavisithchai, associate professor, works at the Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Thailand. He received his PhD from the University of Nottingham, UK in the field of materials design and engineering. His research interests are metallic foams, powder metallurgy, metal matrix composite (MMC) and failure analysis.

Dr. Ruangdaj Tongsri received PhD and DIC in 2000 from Imperial College of Science, Technology and Medicine. He graduated master of metallurgy (M. Met) from Sheffield University, UK, in 1995. Before that he graduated a master degree from Chulalongkorn University, Thailand in 1993 and a bachelor degree from Khon Kaen University in 1989, respectively. He works at National Metals and Materials Center of Thailand (MTEC). His areas of expertise include powder metallurgy, nanotechnology and energy management materials technology.

Nutthita Chuankrerkkul, PhD, is lecturer at Metallurgy and Materials Science Research Institute, Chulalongkorn University, Thailand. She received bachelor degree in materials science and master degree in ceramic technology both from Chulalongkorn University, Thailand and received doctor of philosophy in engineering materials from the University of Sheffield, UK. Her research interest is particulate materials processing, especially in powder injection molding of metals, ceramics, and composites.