elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Non-equilibrium solidification of intermetallic compounds in the Ni-Al alloy system

Hartmann, H. and Reutzel, S. and Galenko, P. K. and Assadi, H. and Herlach, D. M. (2007) Non-equilibrium solidification of intermetallic compounds in the Ni-Al alloy system. TMS Annual Meeting 2007, 2007-02-25 - 2007-03-01, Orlando, FL (USA).

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
603kB

Abstract

Ni-Al alloy system exhibits particular solidication behavior due to chemical long-range order of the intermetallic compounds Ni<sub>3</sub>Al (L1<sub>2</sub>) and NiAl (B2). Using rapid solidication technique their slow solidication kinetics leads to the entrapment of solute atoms and/or disorder, respectively. In the present work containerless processing by applying electromagnetic levitation technique is used to analyze the aspects of dendrite growth, as observed in solidication of undercooled Ni-Al melts. Sharp-interface modeling is used to illustrate the effect of chemical order on the solidication kinetics of intermetallic phases. Both experimental results and theoretical work denote the role of chemical order in solidication of Ni-Al intermetallics.

Document Type:Conference or Workshop Item (Poster)
Title:Non-equilibrium solidification of intermetallic compounds in the Ni-Al alloy system
Authors:
AuthorsInstitution or Email of Authors
Hartmann, H.Ruhr-Universität Bochum
Reutzel, S.Ruhr-Universität Bochum
Galenko, P. K.UNSPECIFIED
Assadi, H.Tarbiat Modarres University, Tehran, Iran
Herlach, D. M.UNSPECIFIED
Date:2007
Status:Published
Keywords:Unterkühlung von Materialien
Event Title:TMS Annual Meeting 2007
Event Location:Orlando, FL (USA)
Event Type:international Conference
Event Dates:2007-02-25 - 2007-03-01
Organizer:The Minerals, Metals and Materials Society
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Institute of Space Simulation > Center for Solidification of Undercooled Melts (ZEUS)
Deposited By: Dr.rer.nat. Sven Reutzel
Deposited On:13 Aug 2007
Last Modified:12 Dec 2013 20:20

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.