Author Archives: Guru

About Guru

I am an Assistant Professor in a Metallurgical Engineering and Materials Science Department; I also pursue research in the broad area of computational materials science.

Classics in Materials Science: Shockley and Read’s dislocation models of crystal grain boundaries

Any crystalline material contains many defects. Depending on the topology of the defects, they can be classified as point, line, surface and volume defects. Of these, only point defects are equilibrium defects — that is, at any temperature above absolute … Continue reading

Posted in Classics | Tagged , , , , , , , , , , | 2 Comments

On computer simulations in materials science

The conventional analytical treatment of actual systems can in fact only be successfully performed in the simplest cases. It fails when a more or less realistic model of multiphase alloys in considered. As a matter of fact, computer simulation is … Continue reading

Posted in General

Classics in Materials Science: Potts model and its relevance to simulation of microstructures

A soap bubble is an extraordinarily beautiful thing and yet it requires virtually no skill to produce. This is because surface tension does all the work for you, making sure that a perfect spherical membrane is produced every time. In … Continue reading

Posted in Classics | Tagged , , , , , , , | 2 Comments

A phase transition called traffic jam

… this is actually a pretty familiar scenario for particle physicists, who are used to studying phase transitions, such as the transformation of liquid water into solid ice. In this case, the critical threshold is temperature, which triggers clusters of … Continue reading

Posted in General

On computers and their use

The metallurgists should stop doing now what the computers can do. The metallurgists should concern themselves with applying the thermodynamic principles to phase equilibria, but they should rely on computers in carrying out the mathematics. This will reduce considerably the … Continue reading

Posted in General, Teaching | 1 Comment

Classics in Materials Science: Harper’s experiments with Snoek pendulum

Introduction Dislocations are one type of defect in a crystalline solid; they distort the crystalline lattice around them; these distortions around a dislocation in a crystal could be dilatational (the distance between planes is more than what it should be) … Continue reading

Posted in Classics | 3 Comments

Materials miscellany: cast-iron guarantee

S Upendran, in today’s Know Your English edition of the Hindu explains the expression.

Posted in General | Tagged