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Proceedings Paper

Hardening and microstructure of aluminum metal surface by laser alloying process
Author(s): Mamoru Okutomi; Akira Obara; Koichi Tsukamoto; Hong Lie Shen
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Paper Abstract

Hardening and microstructure of aluminum metal surface with CO2 laser alloying process have been investigated. Mixtures of Al, Ti powder and organic flux used as alloying elements was painted onto the metal surface and irradiated by one step specimen move technique. To address uniformly distribution of the fine dendrite structure and eliminating of many pores occurred within alloyed layer, new complex technique of laser irradiation with ultrasonic radiation methods was attempted together to modify them. Evaluations of the microstructure within the alloyed surface, hardness and tribological properties have been conducted. The alloyed surface consisted of dendrite structures of the Ti3Al and Al-Ti solid solution. The Ti3Al dendrite crystallized leads to adhere effectively to the aluminum phase, and the surface approaches Hv equals 600 kg/mm2 in hardness. As substantial tribological property, the wear resistance of the alloyed specimen to cast iron was around less 1/7 time than that with comparing of Al metal.

Paper Details

Date Published: 15 August 1998
PDF: 8 pages
Proc. SPIE 3550, Laser Processing of Materials and Industrial Applications II, (15 August 1998); doi: 10.1117/12.317946
Show Author Affiliations
Mamoru Okutomi, Electrotechnical Lab. (Japan)
Akira Obara, Electrotechnical Lab. (Japan)
Koichi Tsukamoto, Electrotechnical Lab. (Japan)
Hong Lie Shen, Shanghai Institute of Metallurgy (China)

Published in SPIE Proceedings Vol. 3550:
Laser Processing of Materials and Industrial Applications II
ShuShen Deng; S. C. Wang, Editor(s)

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