Edge-to-edge matching and its applications - Part II. Application to Mg-Al, Mg-Y and Mg-Mn alloys


Autoria(s): Zhang, M. X.; Kelly, P. M.
Contribuinte(s)

Gunter Gottstein

Subhash Mahajan

Data(s)

01/01/2005

Resumo

A model for the crystallography and morphology of diffusion-controlled phase transformations - edge-to-edge matching - has been used to predict the orientation relationships (OR) and habit planes of precipitates Mg17Al12 in Mg-Al alloy, Mg24Y5 in Mg-Y alloy and alpha-Mn in Mg-Mn alloy. Based on the crystal structures and lattice parameters only, the model predicts that the possible ORs between Mg17Al12 and Mg matrix are the near Burgers OR, the Potter OR, the Gjonnes-Ostmoe OR and the Crawley OR. In the Mg-Y alloy, the OR between Mg24Y5 precipitates and the Mg matrix is predicted to be the Burgers OR only. The model also predicts that there are no reproducible ORs between alpha-Mn and Mg in the Mg-Mn alloy. Combining the edge-to-edge matching model and W. Zhang's Deltag approach, the habit plane and side facets of the precipitate for each OR can be determined. All the predicted ORs and the corresponding habit planes in Mg-Al and Mg-Y alloys agree very well with the experimental results. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Identificador

http://espace.library.uq.edu.au/view/UQ:76360

Idioma(s)

eng

Publicador

Pergamon-Elsevier Science Ltd

Palavras-Chave #Materials Science, Multidisciplinary #Metallurgy & Metallurgical Engineering #Electron Diffraction #Magnesium Alloys #Interface Structure #Phase Transformation #Crystallography #Edge-to-edge Matching #Fcc-bcc Boundaries #O-lattice Theory #Ti-cr Alloy #Structural Ledges #Orientation Relationships #Widmanstatten Cementite #Interphase Boundary #Phase Boundaries #Discontinuous Precipitation #Magnesium Alloys #C1 #291302 Physical Metallurgy #670899 Other non-ferrous metals (e.g. copper, zinc)
Tipo

Journal Article