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Crystal orientation and morphology in Al-Ag-Cu ternary eutectic

Genau, Amber L and Ratke, Lorenz (2011) Crystal orientation and morphology in Al-Ag-Cu ternary eutectic. In: IOP Conf. Series: Materials Science and Engineering, 27 (012032). IOP Publishing Ltd, UK. ICASP 3, 7.-10. June 2011, Rolduc, Netherlands. ISSN 1757-899X

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Official URL: http://iopscience.iop.org/1757-899X/27/1/012032

Abstract

Ternary eutectics provide a unique opportunity for studying the e�ects of complex microstructure formation, as three distinct phases must be formed simultaneously from the melt. In order to produce fully coupled three-phase growth, Al-Ag-Cu at the ternary eutectic composition was directionally solidi�ed in a constant temperature gradient of 3 K/mm at velocities between 0.2 and 5.0 �m/sec. Under these conditions, the two intermetallic phases appear to grow as closely coupled rods in an �(Al) matrix, with the solidi�cation velocity a�ecting the speci�c morphologies chosen by the rods and the general degree of alignment of the structure. Crystal orientations were examined by EBSD to determine if variations in morphology within a single sample are due to speci�c orientation relationships. Although no conclusive connection to morphology has yet been found, two di�erent sets of orientation relationships between the three phases have thus far been identi�ed.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Crystal orientation and morphology in Al-Ag-Cu ternary eutectic
Authors:
AuthorsInstitution or Email of Authors
Genau, Amber LUniversity of Alabama, USA
Ratke, LorenzUNSPECIFIED
Date:December 2011
Journal or Publication Title:IOP Conf. Series: Materials Science and Engineering
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:27
Editors:
EditorsEmail
Ratke, LorenzUNSPECIFIED
Zimmermann, GerhardAccess eV, Aachen
Publisher:IOP Publishing Ltd, UK
ISSN:1757-899X
Status:Published
Keywords:eutectics, ternary alloys, crystal orientation, EBSD, directional solidification
Event Title:ICASP 3
Event Location:Rolduc, Netherlands
Event Type:international Conference
Event Dates:7.-10. June 2011
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Prof. Lorenz Ratke
Deposited On:31 Jan 2012 15:02
Last Modified:12 Dec 2013 21:36

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