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Microstructure evolution in laser alloyed layer of Cu–Fe–Al–Si on Cu substrate

Bysakh, Sandip and Chattopadhyay, Kamanio and Maiwald, Thorsten and Galun, Rolf and Mordike, Barry L (2004) Microstructure evolution in laser alloyed layer of Cu–Fe–Al–Si on Cu substrate. In: Materials Science and Engineering A, 375-37 . pp. 661-665.

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Laser alloyed layers of Cu–Fe–Al–Si were prepared using an 8 kW $CO_2$ laser on copper substrate and a detailed TEM investigation of the cross-section microstructure was carried out. This paper elucidates on the sequence of evolution of various phases constituting a complex microstructure due to non-equilibrium solidification of the laser alloyed layer. The formation of micron size Fe-rich globules having $DO_3$ structure within Cu-rich fcc matrix suggests access to a submerged miscibility gap during the laser processing. The solute rejection processes during later stages of solidification and solid state cooling result in the evolution of submicron size Cu-rich dispersoids inside the Fe-rich globules and the Fe-rich nanoscale fully coherent precipitates within the surrounding Cu-rich matrix.

Item Type: Journal Article
Publication: Materials Science and Engineering A
Publisher: Elsevier
Additional Information: The copyright belongs to Elsevier.
Keywords: Laser cladding;TEM;Metastable microstructure
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 25 Apr 2006
Last Modified: 19 Sep 2010 04:25
URI: http://eprints.iisc.ac.in/id/eprint/6400

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