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Theoretical considerations and experiments on microstructural stability regimes in monotectic alloys

Ratke, Lorenz (2005) Theoretical considerations and experiments on microstructural stability regimes in monotectic alloys. Materials Science and Engineering, 413-414, pp. 504-508.

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Official URL: http://www.sciencedirect.com/science?_ob=IssueURL&_tockey=%23TOC%235588%232005%23995869999%23612101%23FLA%23&_auth=y&view=c&_acct=C000007338&_version=1&_urlVersion=0&_userid=100058&md5=0117b34f0abe5f80e97065d1cd7ef3d6

Abstract

Al–Bi and Al–In alloys of monotectic composition were directionally solidified with solidification velocities from 0.3 m/s to 5 m/s and temperature gradients from 2 K/mm to 6.5 K/mm. The monotectic reaction leads to three distinct microstructural morphologies: fibers, strings of pearls and irregular arrays of second phase droplets, depending on processing conditions. The transition from fibers to string of pearls seems to be a Nichols and Mullins instability. The formation of irregularly arranged drops is interpreted as an effect of repeated nucleation ahead of the solidification front.

Item URL in elib:https://elib.dlr.de/20497/
Document Type:Article
Title:Theoretical considerations and experiments on microstructural stability regimes in monotectic alloys
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ratke, LorenzUNSPECIFIEDUNSPECIFIED
Date:2005
Journal or Publication Title:Materials Science and Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:413-414
Page Range:pp. 504-508
Status:Published
Keywords:Directional solidification, Immiscible alloys, Morphological transitions, Monotectic alloys, Al–Bi; Al–In
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
Deposited By: Ratke, Prof. Lorenz
Deposited On:15 Feb 2006
Last Modified:27 Apr 2009 04:46

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