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

Bysakh, Sandip ; Chattopadhyay, Kamanio ; Maiwald, Thorsten ; Galun, Rolf ; Mordike, Barry L. (2004) Microstructure evolution in laser alloyed layer of Cu-Fe-Al-Si on Cu substrate Materials Science and Engineering: A - Structural Materials - Properties, Microstructure and Processing, 375-377 . pp. 661-665. ISSN 0921-5093

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09215...

Related URL: http://dx.doi.org/10.1016/j.msea.2003.10.263


Laser alloyed layers of Cu-Fe-Al-Si were prepared using an 8 kW CO2 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 DO3 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:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Laser Cladding; TEM; Metastable Microstructure
ID Code:6559
Deposited On:22 Oct 2010 06:40
Last Modified:01 Feb 2011 08:17

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