Some information from the thesis is published in: N. D'Souza, M. Newell, K. Devendra, P.A. Jennings, M.G. Ardakani, B.A. Shollock, Formation of low angle boundaries in Ni-based superalloys, Materials Science and Engineering: A, Volumes 413-414, International Conference on Advances in Solidification Processes, 15 December 2005, Pages 567-570, ISSN 0921-5093, DOI: http://dx.doi.org/10.1016/j.msea.2005.08.188 M. Newell, K. Devendra, P.A. Jennings, N. D'Souza, Role of dendrite branching and growth kinetics in the formation of low angle boundaries in Ni-base superalloys, Materials Science and Engineering: A, Volume 412, Issues 1-2, International Conference on Recent Advances in Composite Materials, 5 December 2005, Pages 307-315, ISSN 0921-5093, DOI: http://dx.doi.org/10.1016/j.msea.2005.09.030