Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10621064 | Acta Materialia | 2005 | 9 Pages |
Abstract
Two stereologically based, microstructural path descriptors ãλã, the mean chord length, sometimes called the intercept free-grain length and Cαα, the contiguity ratio, are discussed from an experimental and kinetics modelling point of view for cases of recrystallization and phase transformation where the new product grains are nucleated in clusters rather than being randomly distributed. The microstructural partial path (MP) function, ãλã versus volume fraction, is derived for three kinetics models based on different patterns of impingement: either (i) the new grains are randomly dispersed or where nuclei are heterogeneously distributed in idealized clusters in (ii) linear or (iii) planar arrays. The model formulations compared favorably with previous experiments on recrystallization of cold and hot worked commercial aluminum. Also, the contiguity ratio was determined experimentally for three cases where clustered nucleation behavior was thought to be prevalent. Positive deviation of Cαα from Cαα â¼Â Vv at low Vv was clearly evident in each example.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
R.A. Vandermeer,