Laser surface alloying : mechanism of formation and improvement of surface properties

Improvement of the surface of materials to bring about desirable properties may be achieved by laser surface alloying. After a brief review of the mechanisms of formation of surface alloys by the addition of specific elements and laser melting, different examples are reported: improvement of mechani...

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Bibliographic Details
Published in:Journal of materials engineering 1991-12, Vol.13 (4), p.281-290
Main Authors: PELLETIER, J. M, JOBEZ, S, SAIF, Q, KIRAT, P, VANNES, A. B
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Metals. Metallurgy
Production techniques
Surface treatment
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Summary:Improvement of the surface of materials to bring about desirable properties may be achieved by laser surface alloying. After a brief review of the mechanisms of formation of surface alloys by the addition of specific elements and laser melting, different examples are reported: improvement of mechanical surface properties of Al base alloys (e.g. A-S5U3, A-S12UN, A-S17U4G) by the electrodeposition of Ni coatings followed by laser treatment; improvement of the thermal fatigue lifetime of low carbon steels (e.g. 1038), a Ni coating is first obtained by plasma spraying; and improvement of mechanical properties of Fe base (e.g. 1018) alloys by powder injection of tungsten particles. Microstructure is always characterized by micrographic observation, X-ray diffraction experiments, and chemical analysis. Finally, the general ability of the processing is reviewed.
ISSN:0931-7058
DOI:10.1007/BF02834030