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Volume 16 Issue 5 October 1993 pp 331-340
Surface alloying of pure iron by molybdenum and tin by a continuous wave CO2 laser
I S Batra K Bhanumurthy S K Khera A K Sinha A R Biswas V I Titov M B Ignatiev A Uglov
It is now well established that considerable improvement in the mechanical/chemical properties of near surface regions of materials can be achieved by the process of laser surface alloying. The change in chemistry at the surface is attained through the process of melting and mixing of a predeposited coating and a thin layer of the substrate. Rapid solidification of this molten region at the surface then results in the development of very interesting microstructural features. In the present work, an attempt was made to surface alloy pure iron by molybdenum and/or tin by using a continuous wave CO2 laser. Morphology of the resulting microstructural features was examined by optical as well as scanning electron microscopy and the compositional details were determined using an electron probe microanalyser. Microhardness measurements were carried out as a function of depth from the laser-treated surface. This paper discusses the results of these investigations and delineates the roles of the various parameters on the chemistry and microstructure of the surface alloys formed as a result of laser treatment.
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Bulletin of Materials Science
Volume 46, 2023
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