Characteristic length of the solidified melt pool in selective laser melting process

Il Hyuk Ahn is an Assistant Professor in Tongmyoung University, South Korea. He received his PhD, MS and BS degrees in Mechanical Engineering from Korea University, South Korea, in 2010, 2002 and 1999, respectively. He worked as a Senior Research Engineer at LG Electronics for three years. In 2014, he joined SC3DP (Singapore Centre for 3D Printing in the School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore) as a Research Fellow. During the three years (2014-2016), he has studied quality control, product design and multidiscipline design optimization based on the laser-aided AM with metal/ceramic powders. His current studies focus on the product design based on AM process.

Seung Ki Moon is an Assistant Professor in the School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore. He received his PhD degree in Industrial Engineering from the Pennsylvania State University, USA, in 2008, and his MS and BS degrees in Industrial Engineering from Hanyang University, South Korea, in 1995 and 1992, respectively. He worked as a Senior Research Engineer at the Hyundai Motor Company, South Korea, for eight years before embarking on his PhD degree. After completing his doctoral degree, he joined the Department of Mechanical Engineering, Texas A&M University, for one year as a Postdoctoral Research Associate. He is interested in the boundary-spanning research that integrates the knowledge of design, engineering and economics. His current focuses include applying the sciences and economic theory to the design of customized and sustainable products, services and systems, strategic and multidisciplinary design optimization, advanced modeling and simulation, design for AM/3D printing, embedded sensor design for 3D Printing and advanced remanufacturing.

Jihong Hwang got his PhD degree in Industrial Engineering at Purdue University, West Lafayette, IN, USA, in 2005. He received Masters and Bachelors degree in Mechanical Design and Production Engineering from Seoul National University, Seoul, South Korea. He is currently working as an Associate Professor in the Department of Mechanical System Design Engineering at Seoul National University of Science and Technology, Seoul, South Korea. His research interests are mainly in the areas of material removal and AM processes. Also, product design for manufacturing is within his research horizon.

Guijun Bi is a Research Scientist from Joining Technology Group, Singapore Institute of Manufacturing Technology. He received his PhD degree in Laser Material Processing from Fraunhofer Institute for Laser Technology and RWTH Aachen University, Germany, in 2004. Then, he worked as a Research Fellow at Rolls-Royce Technology Center in School of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, UK. In 2008, he joined SIMTech. His research concentrates on laser-aided AM for surface modification, repair and 3DAM and process monitoring and control.