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|
|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|
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