?School of Mechanical, Materials and Mechatronic Engineering
SEMINAR Elemental segregation behaviour and its effect on the resistance spot weldability of advanced high strength steels
PRESENTER Dr. Murugaiyan Amirthalingam WHERE BLD8 G25 DATE Friday 26th of February 2016 TIME 12.30 -13.30
ABSTRACT Development of automotive steels with enhanced ductility and strength levels of 1GPa and above has been the focus of considerable academic and industrial activity. Although several alloying strategies for these steels exist, most of them have relatively high levels of carbon, manganese, silicon and /or phosphorous. Unfortunately, this combination of high strength and high alloying levels can have a detrimental influence on the resistance spot weld mechanical properties. These materials often suffer from brittle weld metal failure at low strength levels, when subjected to peel type loading. Since resistance spot welding is the key joining process for automotive applications, much effort is expended to optimise the weldability of these steels.
The partitioning behaviour of alloying elements during the solidification of advanced high strength steel resistance spot weld pool is studied by means of phase field modelling and experimental investigations. In this talk, how the results of that investigation is used to identify a combination of clever alloying strategy and an alternative and optimised weld scheme, is presented.
ABOUT THE SPEAKER Dr. Muru Amirthalingam is currently working in Indian Institute of Technology (IIT) Madras, India as an assistant professor of Materials Joining in the department of Metallurgical and Materials Engineering. He is also a guest research fellow in the group of Joining and Mechanical Behaviour of Materials Science and Engineering department in Delft University of Technology, The Netherlands.
Muru completed his PhD in Delft in 2009. During PhD and subsequent postdoctoral and research fellowships, he carried out extensive experimental and physically based mathematical modelling investigations on the welding behaviour of automotive, structural, pipelines and off-shore steels. His research interests include welding metallurgy, welding process modelling, steel product development, modelling phase transformations in steels and in-situ 3D synchrotron X-ray diffraction.
He is a recipient of "Kenneth Eastering" best paper award for the year 2015 from the International Institute of Welding (IIW) for presenting a paper which is valued by an international committee as the best contribution made over the three years proceeding on the advancement of knowledge or practice in respect of mathematical modelling of weld phenomena.
His PhD thesis was nominated for "Henry Granjon" prize of IIW from the Netherlands for the best thesis in the category of "metallurgy of welding" in the year 2010. He has so far published 30 journal papers, 3 contributions to books and about 50 presentations in conferences and invited lectures.
Following the seminar, you are all welcome to join Dr. Muru Amirthalingam for lunch and further discussion which will be held in 8.114 at 13.30pm.
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