Microstructure evolution in laser alloyed layer of Cu–Fe–Al–Si on Cu substrate
| Autor: | Kamanio Chattopadhyay, Sandip Bysakh, T. Maiwald, Barry L. Mordike, R. Galun |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Spinodal decomposition Mechanical Engineering Metallurgy Solid-state Materials Engineering (formerly Metallurgy) Substrate (electronics) Condensed Matter Physics Microstructure Laser Matrix (geology) law.invention Chemical engineering Mechanics of Materials law General Materials Science Nanoscopic scale Layer (electronics) |
| Zdroj: | Materials Science and Engineering: A. :661-665 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2003.10.263 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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