Plenary Lecturers

Plenaly Talk 1

"Advances in Tribological Coatings for Superlubricity and Ultra-high Wear Resistance"

・Abstract

In recent decades, great strides have been made in the design, synthesis, and applications of super-hard and -lubricious coatings ranging in thickness from a few atomic layers to tens of micrometers for use under harsh operating conditions including manufacturing. Prime examples of ultra-thin but superlow-friction and -wear coatings include graphene, MoS₂, HBN, etc., while those that are several micrometer-thick are in the forms of nano-laminates or –composites of hard nitride, carbide and boride coatings that are also lubricant-friendly and catalytically active. Overall, these coatings offer super-hardness, -toughness and high resistant to wear; while some of them are even able to provide ultra- low friction coefficients as low as 0.001. In this presentation, a comprehensive overview of such extraordinarily low friction and wear properties of such coatings will be outlined in light of the recent fundamental studies as well as many intrinsic and extrinsic factors that are in play. Further, an attempt will be made to recap those mechanisms that are most responsible for their exceptional friction and wear performance. Overall, these and other new developments in our tribology field are leading the way for further reducing friction in real mechanical systems including manufacturing and hence potentially contributing to a green and sustainable future.

Keywords: Nanocomposite coatings, friction, wear, lubrication, manufacturing

Prof. Ali Erdemir

Professor of Mechanical Engineering and Materials Science and Engineering

Halliburton Chair in Engineering

Texas A&M University

Short Bio:

Dr. ALI ERDEMIR is a Professor and Halliburton Chair in the Mechanical Engineering and Materials Science and Engineering Departments of the Texas A&M University, College Station, Texas, USA. In recognition of his research accomplishments, Dr. Erdemir has received numerous coveted awards and honors as being elected to the US National Academy of Engineering, World Academy of Ceramics, the Presidency of the International Tribology Council and STLE. He is also a Fellow of AAAS, ASME, STLE, AVS, and ASM-International. He has authored/co-authored more than 300 research articles, co-edited four books, presented more than 200 invited/keynote/plenary talks, and holds 31 U.S. patents. His current research focuses on bridging scientific principles with engineering innovations towards the development of super-hard and -low-friction materials, coatings, and lubricants for a broad range of cross-cutting industrial applications.

Plenary Talk 2

"An Integrated Experimental and Molecular Modelling Approach to Investigate Tribological Mechanics in Hot Rolling of Metal"

・Abstract

Metal rolling processes are characterised by a combination of large plastic deformation, tribological factors and complex loading modes. In hot rolling process, the surface of work roll is initially heated up to 650^oC while in contact with hot steel strips for 10^-2-10^-3s, and subsequently cooled by water to around 50 ^oC during the same cycle. The work-roll surface are subjected to high loading, high temperature up to 650^oC and high rolling velocity (>10m/s), the work-roll surface inevitably degrades (e.g. oxidation, wear, abrasion, fatigue, etc.).

Lubricants are introduced at the roll bite during the rolling to reduce friction, roll wear and to provide some cooling. At the strip-lubricant-roll interface, tribology has a significant influence on the dimensional accuracy and the surface quality of strip.

Friction at the strip/roll interfaces during deformation can directly affect the rolling pressure and the roll gap that control the final strip thickness. Roll wear affects the control of the strip shape and profile, flatness, and its surface finish.

This presentation will discuss an integrated approach to investigate many tribological aspects in hot rolling of steel, from experimental work to molecular modelling. It covers lubrication mechanics of a number of environmentally friendly lubricants that are effective at high temperature, and their effects on the product quality, oxidative and abrasive wear of the strip and work roll.

Keyword: High temperature lubricants, friction, wear, lubrication, hot rolling, steel

Prof. Kiet Tieu

School of Mechanical, Materials, Mechatronic and Biomedical Engineering

University of Wollongong, Australia

Dr Kiet Tieu is a Senior Professor at University of Wollongong Australia. He graduated with BE (Hons.) and PhD from the University of Western Australia. He was a Research Engineer at Bluescope Steel (Australia) for 8 years before joining the University of Wollongong in 1982.

He was elected to the Australian Academy of Technological Science and Engineering in 2007. He was awarded in 2011 the Quangcheng Friendship Award by the Jinan Municipal’s government, and the Qilu Friendship award by the Shandong Provincial People’s Government (China) for research on strip shape control in hot rolling. He received in 2012 the William Johnson International Gold Medal by the International Committee for Advances in Materials and Processing Technologies (AMPT). He has co-authored 475 journal articles covering different aspects of tribology and metal forming.

Plenaly Talk 3

"Overview of Metal Forming Research in Indian Academia"

・Abstract

Metal forming is a major manufacturing approach for producing components that are used in day-to-day life. In order to meet with the ever-demanding requirements of automotive, aerospace and other sectors, there is a great need for developments in materials and innovative manufacturing processes. Several groups in India are actively pursuing research in metal forming, focusing both on fundamental and applications aspects. In this presentation an overview will be provided on the key research groups working in the metal forming arena. Further the metal forming activity at Indian Institute of Technology Bombay will be highlighted.

In our group, currently research is pursued in three broad metal forming domains – Hot stamping of steel sheets, Incremental Sheet Metal Forming of Aluminum alloys and Ring Rolling of Ti alloys. Some of the key findings in these domains will be discussed.

Prof. K. Narasimhan

IIndian Institute of Technology Bombay, Mumbai, India

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