The School of Mechanical and Materials Engineering Seminar Series, “The mechanism of micro-texture formation and its importance in Ti-6Al-4V alloy” Presented by Dr. Shibayan Roy

About the event

The mechanism of micro-texture formation and its importance in Ti-6Al-4V alloy

Presented by Shibayan Roy, Assistant Professor, Materials Science Center, Indian Institute of Technology IIT Kharagpur, Kharagpur 721302, India

Abstract:
The presentation first talks about the evolution of microstructural features and their orientations at the (prior) β grain boundary regions for an as-cast and β-worked Ti-6Al-4V alloy. It also connects the microstructure and bulk texture evolution through the orientation of individual microstructural features and related microtexture formation. The next part deals with orientation dependent spheroidization response and α-phase texture evolution during sub β-transus annealing for warm-rolled Ti-6Al-4V alloy. Spheroidization response of the constituent α-colonies is known to differ significantly during sub β-transus static annealing. The mechanics of this process is examined for the first time from the perspective of crystallite lattice orientations by coupling slip activation, boundary formation and interfacial energy anisotropy of individual α-colonies. These insights are extremely important since micro-textural features e.g. micro-textured regions within the bimodal microstructure after TMP influence various fracture critical mechanical properties, specifically the fatigue life.

Biography:
Dr. Shibayan Roy is working currently an Associate Professor in the Materials Science Center of the Indian Institute of Technology, IIT Kharagpur from November 2015. Previously, he was a post-doctoral research associate in the Materials Science and Technology Division at Oak Ridge National Laboratory, Oak Ridge, Tennessee from November, 2013 to October 2015. He worked as a post-doctoral researcher in the Department of Mechanical Engineering at Chemnitz University of Technology, Chemnitz, Germany from February 2012 to September, 2013.

Dr. Roy graduated from Calcutta University with a Bachelor degree in Ceramic Technology in July 2003. He subsequently completed the Master’s program at the Department of Metallurgical and Materials Engineering (MME), from the Indian Institute of Technology (IIT Kanpur) in May 2005. He worked in the National Aerospace Laboratories (NAL), Bangalore as Scientist B from June 2005 to July 2006. He obtained his PhD degree from the Department of Materials Engineering, Indian Institute of Science (IISc), Bangalore in 2011.