ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Laser surface alloying is an attractive processing to improve surface hardness, wear andcorrosion resistance. In this paper, a continuous wave CO2 laser was used to irradiate commercially puretitanium surface with pre-placed active carbon powders in argon atmosphere. A compact, well-adherent,and crack-free TiC/Ti composite layer was obtained. The microstructure and phase constitution of thealloyed layers were determined and analyzed, and the micro-hardness was measured. The result of X raydiffraction (XRD) analysis shows that the alloyed layers contain TiC and Ti (martensite). The scanningelectron microscopy (SEM) observation shows TiC growth morphologies have a well-developed dendrite,cellular dendrite, globular microstructure and cross-petal microstructure. The mechanism of theformation of titanium carbides is discussed. Micro-hardness of the laser surface alloyed layer wasimproved to 420 Hv as compared to 200 Hv of the as-received commercially pure titanium
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1148.pdf
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