Paper Title:
Description of Crystallographic Morphologies of Product Phases with Singularity and Δg Distribution
  Abstract

Product phases from various phase transformations often exhibit fascinating morphologies. Facets of unique crystallographic orientations are characteristic of the morphologies. Based on a comparison of facets in the surfaces and interfaces of crystals, this paper proposes to use singularity as the common features of facets on a crystal. While association of facets with energy singularity has been established from the Wulff construction, we defined singularity in structure with an absence of one or more types of defects common to a vicinal surface or interface. Singularity in an interfacial structure is described in terms of both ledges and dislocations. When dislocations are involved, the candidates of the singular interfaces derive mainly from the principal O-lattice planes. The orientations of these planes are defined by Δg’s, which are measurable in diffraction patterns. Singularity with respect to the orientation relationship results from further eliminating defects, which is permitted by a special arrangement of Δg’s. The candidates of singular interface confined by the arrangement of discrete Δg’s are helpful for understanding the crystallographic morphology. One example from an Mg alloy is provided to show the association of the singular interfaces with Δg’s. The effect of the potential presence of a long-range strain and kinetic effects are briefly discussed.

  Info
Periodical
Solid State Phenomena (Volumes 172-174)
Edited by
Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson
Pages
1096-1105
DOI
10.4028/www.scientific.net/SSP.172-174.1096
Citation
W. Z. Zhang, Z. Z. Shi, "Description of Crystallographic Morphologies of Product Phases with Singularity and Δg Distribution", Solid State Phenomena, Vols. 172-174, pp. 1096-1105, 2011
Online since
June 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jin Quan Xu, Yoshiharu Mutoh, Lie Dong Fu
607
Authors: Yi Cao, Hui Zhou, Bao Kun Li, Shen Long, Meng Si Liu
Abstract:This paper mainly addresses the principle of the singularity elimination of the Stewart parallel platform. By adding appropriate redundant...
308
Authors: Bin Shen, Dang Jin Qi, Liu Qun Fan, Zhi Hao Zhu
Advanced Manufacturing Technology
Abstract:In the 5-axis machining, when the tool orientation approaches the one of the rotation axis, the sharp changing of the rotation angles...
2974