The work in the Deformation Mechanisms and Modeling Group is carried out by the students, interns and project assistants in our group. Our research is also supported and enabled by our collaborators and technical staff.

Our Group:

Faculty:

Current Students:

Hindol Bandyopadhyay: PhD candidate since Jan 2006 working on Strain-rate and grain-size effects on the deformation behavior of tantalum	Prasath Babu: PhD candidate since Aug 2006 working on Effect of stress and temperature on microstructural stability of gamma TiAl alloys
Veera Babu: PHD candidate (external registrant from DMRL) since Aug 2008 who will work on precipitation strengthening mechanisms in high-strength steels	R. Bharathi: PhD candidate since Aug 2008 working on mechanical behavior of Mg alloys subjected to high strain rates
U. Sai Babu: PHD candidate since Jan 2009 who will  work on microstructure and creep properties of irradiated vanadium alloys	Aparajita Pramanik: PhD candidate since Jan 2009 who will work on creep behavior of austenitic stainless steel strengthened with copper precipitates
Priyanka Agrawal: ME candidate since Jan 2009 who will continue work on effect of boron additions on mechanical properties of Ti-6Al-4V	Sujan Hazra: PhD candidate since Aug 2009. He will be working on a first principles and experimental study of alloying effects in magnesium

 

Project Assistants and Summer Interns:

V. Rajakumaran: Raj joined my group in June 2008 as a project assistant and is working on strain rate effects on mechanical properties of AHSS.	K.V. Vamsi: Vamsi finished his ME and his thesis topic was First principles calculations of structural stabilities in Ni3(Al,Ti) system. Though he's headed over to Tata Steel R&D, his interactions with the group continue
Vasantha Venkataraman: Vasantha has been with the group since Sept 2008 as a project assistant working on mechanical behavior of Mg alloys subjected to high strain rates. She's wrapped up her work and is now headed to University of Stuttgart for her Masters	R. Sivaraman: Siva will be entering his 3rd year of B.Tech in MME at IIT-M. At IISc, he did his summer project, sponsored by the JNCASR summer fellowship programme is on dislocation dynamics simulations of jogged-screw dislocations. He is camera-shy. So we took a lot of pics of him trying hard to smile. . We look forward to his returning.

 

Previous Students, Project Assistants and other Associates:

U. Sai Babu: Sai graduated in July 2008 as my second ME student. He worked on understanding the effect of boron additions on mechanical properties of Ti-6Al-4V. Sai has apparently NOT had enough of metallurgy and so he's returned for his PhD. My first ME student to do so.	Vinay Jain: My first ME student who graduated in July 2007. Vinay worked on atomistic simulations of planar faults in Ni3Al. He is presently working at Tata Research Development and Design Centre, Pune. His research interactions with our group continue.
Anupriya Agrawal: Anupriya spent two summers (2006, 2007) in my lab as a JNC summer fellow. She worked on  mechanical properties of Ti-6Al-4V-xB alloys and on atomistic simulations of sliding interactions. She has now joined The Ohio State University in Jan 2008 for her PhD.	Rohan Mishra: Rohan spent the last summer (2007) in my lab as a JNC summer fellow working on dislocation dynamics simulations of dislocation-precipitate interactions in Ni3Al. He finished his  BTech from NITK, Surathkal and is also at Ohio State since Sep 2008 for his PhD.
Ramana Murthy Kolluri: ME student (of Prof. U. Ramamurty, graduated in July 2006) with whom I interacted closely on modeling flow behavior of Al-foams under constraint. He is presently pursuing his PhD at Eindhoven University of Technology, Eindhoven.	Rajnish Sinha: Rajnish Sinha was a project assistant (August 2006-March 2007) who worked on the mechanical properties of Ti-6Al-4V-xB alloys. He is presently pursuing his PhD at University of Florida, Gainesville.

Collaborators:

• Dr. Raja K. Mishra (General Motors Research & Development Center, Warren, Michigan): Dr. Mishra brings his EBSD expertise, knowledge of Mg alloys and coordination skills to the GM funded project on the mechanical behavior of Mg alloys subjected to high strain rates.

• Prof. K. Chattopadhyay (Dept. of Materials Engineering, IISc, Bangalore): We are collaborating on using molecular dynamics simulations to understand microstructural and composition evolution during sliding contact between dissimilar metals (say during friction welding) and between metals and glasses.

• Prof. Gunther Eggeler (Chair of Materials Science and Engineering, Department of Mechanical Engineering, Ruhr-University Bochum, Germany): We are working on understanding the interplay between dislocation-mediated plasticity, twinning and dynamic recrystallization during creep of gamma titanium aluminides. At IISc, we are characterizing samples crept at Bochum to look at how microstructure evolves as a function of strain, stress and temperature

• Dr. U. Waghmare (Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur): We are currently collaborating on first-principles calculations of stacking fault energies in Ni₃Al

• Prof. Mike Mills (Department of Materials Engineering, The Ohio State University, Columbus, OH, USA): Mike was my PhD thesis advisor. We worked on modeling creep behavior in gamma TiAl. For details of this work click here. I still continue to work with Mike on understanding microtwinning during creep of Ni-base disk alloys. At our end we are doing atomistic and dislocation dynamics simulations to understand and explain why, how and how fast microtwinning occurs. The creep testing and microscopy work is done at Ohio State.

• Prof. David Rigney (Department of Materials Engineering, The Ohio State University, Columbus, OH, USA): After my PhD I was a post-doc in Prof. Rigney's lab. There I was characterizing plastic deformation that occurs during sliding. For details of this work click here. I am still wrapping up work from my post-doc days. In particular I continue to collaborate with Prof. Rigney on analytical modeling of strain-rate and strain profiles and atomistic modeling of sliding. Prof. Rigney retired from active service earlier this year and is now Professor Emeritus after 40 years at Ohio State. Though I was unable to attend his retirement party, I'd sent a farewell note, excerpts from which were read at the function and which can be read in its entirety here.

• Prof. U. Ramamurty (Dept. of Materials Engineering, IISc, Bangalore): We are currently collaborating on understanding the role of boron on the deformation behavior of Ti-6Al-4V alloys. Prof. Ramamurty's groups has been involved in looking at the fracture/fatigue behavior. We have previously collaborated on modeling deformation behavior of metal foams

• Dr. K. Sivaprasad (Dept. of Metallurgical and Materials Engineering, National Institute of Technology, Trichy): Siva and I, along with Prof. Aloke Paul (Dept. of Materials Engineering, IISc, Bangalore) will be investigating the mechanical properties of metal-intermetallic laminates produced by diffusion bonding. This work will be conducted under the aegis of the UGC Networking Center for Materials.