Pinning efficiency of austenite grain boundary by a cubic shaped TiN particle in hot rolled HSLA steel

Abstract

The Zener coefficient of a cubic shaped particle was modified. Most previous developments of Zener coefficients have been based on the assumption that the particle is spherical. However, some particles have non-spherical geometries, and then a modification of the Zener coefficient that is based on the shape of each particle is needed. In this research, a cubic TiN particle was considered. A Zener coefficient of cubic shape TiN was calculated theoretically with appropriate assumptions. Using a semi-empirical method, the Zener coefficient was also measured. Zener coefficient was strongly dependent on the contact geometry between the grain and the particle. (C) 2012 Elsevier Inc. All rights reserved.