Microstructure and mechanical properties of laser surface alloyed coatings prepared on cast Al–Si
Authors: Cai, X.; Yang, X.; Wang, J.
Source: Surface Engineering, Volume 15, Number 2, April 1999 , pp. 115-118(4)
Publisher: Maney Publishing
Abstract:Laser surface alloyed (LSA) layers were obtained on cast Al–Si using a CO2 continuous transverse flow laser beam with maximum power of 10 kW. The microstructure of the modified layers was examined using scanning electron microscopy and transmission electron microscopy. Surface alloying with Ni based powder generated a layer composed of -Ni(Cr,Fe), Ni3 Al, T(Al,Fe,Si), CrB, and Cr23 C6 . The matrix phase in the modified layer was -Ni(Cr,Fe), with strengthening phases present. Microhardness and wear resistance tests were also performed: the average microhardness is around 3·1 to 3·6 GPa, three times higher than in the substrate. The antiwear properties of the LSA modified layers were also greatly improved, with relative wear resistance approaching 10 to 12. Finally, the wear mechanisms of LSA modified layers were studied by surface morphology analysis.
Document Type: Regular Paper
Affiliations: The School of Materials Science and Engineering, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai, 200030, China
Publication date: 1999-04-01
- Materials Science and Technology is Journal of the Month in November. This means free online access to all of the last 3 years of content, including the most recently published 2013 articles! Find out more here
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Online submission site
- ingentaconnect is not responsible for the content or availability of external websites