A systematic study of irrational precipitation crystallography in fcc-bcc systems with an analytical O-line method

Qiu, D. and Zhang, W. Z. (2003) A systematic study of irrational precipitation crystallography in fcc-bcc systems with an analytical O-line method. Philosophical Magazine, 83 27: 3093-3116. doi:10.1080/14786430310001594266


Author Qiu, D.
Zhang, W. Z.
Title A systematic study of irrational precipitation crystallography in fcc-bcc systems with an analytical O-line method
Journal name Philosophical Magazine   Check publisher's open access policy
ISSN 1478-6443
1364-2812
Publication date 2003
Sub-type Article (original research)
DOI 10.1080/14786430310001594266
Volume 83
Issue 27
Start page 3093
End page 3116
Total pages 24
Place of publication Abingdon
Publisher Taylor & Francis Ltd
Language eng
Subject 0912 Materials Engineering
Abstract Precipitations that exhibit irrational transformation crystallography can often be explained in terms of the O-lines in the habit plane. The present work developed an analytical O-line method, which is more useful than the numerical O-line method to study the variation in the habit plane and its structure in a systematic manner. This method has an advantage that the orientation relationship (OR) is the output from the calculation, while in many other models interpreting precipitation crystallography the OR is either an input or is constrained by a prerequisite condition. This paper described the derivation of this method and its application to the study of the precipitation crystallography in fcc-bcc systems. Examples were given for three alloy systems, namely Cu-0.33 wt% Cr and Ni-45 wt% Cr alloys and a duplex-phase alpha-gamma stainless steel. The solutions include the OR between the precipitates and their matrix, the habit plane, the invariant line and the dislocation structure in the habit plane. The calculated results are in good agreement with the experimental observations reported in the literatures. Furthermore, the variation in the optimum O-line features with the lattice parameter ratio has also been studied systematically, providing some guidelines for estimating and understanding possible transformation crystallography from different fcc-bcc systems.
Keyword Materials Science, Multidisciplinary
Mechanics
Metallurgy & Metallurgical Engineering
Physics, Applied
Physics, Condensed Matter
Percent Cr Alloy
Invariant Line
Boundaries
Morphology
Lattice
Phase
Interface
Cu
Dislocations
Particles
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Mechanical & Mining Engineering Publications
 
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