September 12, 2014 - 12:00 pm
September 12, 2014 - 12:00 pm
You are cordially invited to attend a talk on “Can Low Cost TIG Welding Torch be a Substitute of Laser Beam for Metal Surface Coating?”. The presenter is Dr. Shahjahan Mridha, visiting professor at the University of Strathclyde. Talk Summary Can Low Cost TIG Welding Torch be a Substitute of Laser Beam for Metal Surface Coating High energy Laser and Electron beam processing techniques are widely used to produce coatings on the surface of bulk material for protection against wear and corrosion damages. However these techniques require expensive establishment and precision control. An alternative and novel method is developed to produce similar type of coatings using conventional Tungsten Inert Gas (TIG) Welding torch technique which requires low cost establishment, cheaper maintenance, and simpler and flexible in operation. The talk will focus on the factors responsible for the formation of coating layer on titanium and steel surfaces using TIG technique and compare properties of some selected coatings with those produced by laser processing. Short Biography of Professor Mridha Professor Shahjahan Mridha obtained his B. Sc Engineering in 1971, M. Sc. Engineering in 1976 from Bangladesh University of Engineering & Technology (BUET) and Ph. D in 1980 from Leeds University in England. He began his career as a lecturer in the BUET in 1972 and served there in various capacities for 20 years. He worked on Refractory Materials for his master degree and Gas Nitriding of Low Alloy Steels for Ph.D. In his career he was at Birmingham University as a Commonwealth Academic Staff in 1986-87 and worked on Plasma Nitriding. From 1989 to 1994 he was a Senior Research Fellow at the University of Strathclyde, Glasgow and worked on Laser Processing of aerospace materials in collaboration with UK Ministry of Defence. In December 1994 he moved to Nanyang Technological University (NTU) in Singapore and worked there until 2001 as an Associate Professor. His research in NTU was mainly on Semiconductor Materials (copper metallization of silicon wafer, defects of thin films on silicon wafers), composite and Intermetallic coatings. In January 2002 he joined the International Islamic University Malaysia (IIUM) where he was a Professor and Head of the Department of Manufacturing and Materials Engineering. He worked in IIUM up to July 2012. Then he moved to UK and worked as a Leverhulme Trust Professor in the Department of Mechanical and Aerospace Engineering at the University of Strathclyde, Glasgow until the end of 2013. Currently he is a Visiting Professor in the same Department. Professor Mridha also worked as an International Consultant of UNIDO from 2001 to 2007 for melting industries at Amritsar and Jhalandar in Punjab, India. His current research interests are mainly on Surface modification of metal by laser beam and TIG torch melting techniques, composite and intermetallics coatings, microstructure properties relationship and welding. He has published more than 150 journal and conference papers.