Conference proceeding
Particle limited grain growth: experiments and simulations
ICGG-3: Third International Conference on Grain Growth; Pittsburgh, PA; USA; 14-19 June 1998
14 Jun 1998
Abstract
The Monte Carlo - Potts Model (MCPM) simulations of particle limited grain growth in three dimensions (3D) [1,2,3] match experiments rather well. Experimental results usually show: (i) A smaller grain size than predicted by the classic Zener model, (ii) A dependence on reciprocal volume fraction, 1/f exp n , where the exponent n is less than 1 and (iii) A large scatter in the pinned normal grain size when plotted against particle parameters. The MCPM simulations show all these characteristics. The apparent reason for these effects is that, although the Zener model of particle drag appears valid for the inhibition of volume energy driven boundary migration, as in recrystallization, it fails for curvature driven grain growth. The particles have a more direct effect on normal grain growth than providing a drag - they remove the boundary curvature. The scatter in the pinned grain size appears to arise from the role of (a) the initial grain size and (b) the initial correlation of particles and grain boundaries. Abnormal grain growth, AGG, seems however to be controlled by the Zener limit. As a result AGG should then occur in conditions of (i) a fine matrix grain size and (ii) a low volume fraction of second phase pinning particles. Experiments support this prediction rather well. Previous research is cited involving the Al-Al sub 3 Fe system.
Metrics
11 Record Views
Details
- Title
- Particle limited grain growth: experiments and simulations
- Creators
- R DohertyK LiM Anderson
- Publication Details
- ICGG-3: Third International Conference on Grain Growth; Pittsburgh, PA; USA; 14-19 June 1998
- Conference
- ICGG-3: Third International Conference on Grain Growth, 3rd (Pittsburgh, Pennsylvania, United States, 14 Jun 1998 - 19 Jun 1998)
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- [Retired Faculty]
- Identifiers
- 991019170465004721