Comparative study of electron and laser beam surface alloying

Stefan Ts. Valkov; Peter Iv. Petrov; Rumiana L. Lazarova

doi:10.1117/12.2262352

5 January 2017 Comparative study of electron and laser beam surface alloying

Stefan Ts. Valkov, Peter Iv. Petrov, Rumiana L. Lazarova

Proceedings Volume 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications; 102260I (2017) https://doi.org/10.1117/12.2262352
Event: International Conference and School on Quantum Electronics "Laser Physics and Applications" - ICSQE 2016, 2016, Sozopol, Bulgaria

Abstract

High intensity energy fluxes, such as electron beams and laser beams are widely used for surface alloying of metals and alloys. These technologies are able to cause the formation of the so called melt pool where the alloying elements interact each other. It is known that the homogenization of the surface alloy can be explained by intense Marangoni convection, caused by the high temperature gradient in the melt pool. The convection is inversely to the speed of the specimen motion during the alloying process and therefore, the choice of low alloying velocity will reflect on more homogeneous structure of the obtained alloy. In this study, a comparison of the structure and properties of electron and laser beam surface alloying of aluminium with niobium was conducted. The phase composition of the alloyed layers was determined by XRD (X-ray diffraction) with CuKα radiation. The microstructure was studied by SEM (Scanning Electron Microscopy). Chemical analysis was carried out using an EDX electron probe microanalyser. The microhardness of the obtained samples is also measured and compared with respect to the technology of the formation of each surface alloy.

Citation Download Citation

Stefan Ts. Valkov, Peter Iv. Petrov, and Rumiana L. Lazarova "Comparative study of electron and laser beam surface alloying", Proc. SPIE 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications, 102260I (5 January 2017); https://doi.org/10.1117/12.2262352

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