Dislocation Dynamics

Materials are like people, they only get interesting when they have defects

During my last 2 years at IIT Bombay I became interested in the study of dislocations, which are defects in the periodic lattice of a crystal. Defects are the reason why materials have lower strengths than expected theoretically, but are responsible for properties such as malleability and ductility in metals. When dislocations interact they produce a host of interesting effects, one of which is to increase the strength of the material.

Under the guidance of Professor Prita Pant, I explored the effect of interactions between dislocations in multi-layered systems using dislocation dynamics. Multilayers are a series of thin films of different materials put together such that there are many interfaces present. There can be a strengthening effect due to the interfaces present and the goal of the study was to try and quantify these effects using dislocation dynamics. The basic idea of Dislocation Dynamics is to compute the forces on a dislocation due to applied stresses, interactions with other dislocations and from line tension effects.


My undergraduate research thesis, which describes this work, can be found here as a presentation and here in pdf form. My work was sponsored by the Industrial Research and Consultancy Centre (IRCC) as part of the Undergraduate Research Opportunity Project (UROP), which is awarded to students who show aptitude towards research.

Research Internship

I was introduced to the subject of Dislocation Dynamics by one of the pioneers of the field Prof Erik Van der Giessen. I worked with him at the University of Groningen as well as with his former student Prof Lucia Nicola, who is now a professor at TU Delft. A small power point presentation describing my work and some initial results can be found here. The report with greater detail can be found here.