Hardening and microstructure of aluminum metal surface by laser alloying process

Mamoru Okutomi; Akira Obara; Koichi Tsukamoto; Hong Lie Shen

doi:10.1117/12.317946

15 August 1998 Hardening and microstructure of aluminum metal surface by laser alloying process

Mamoru Okutomi, Akira Obara, Koichi Tsukamoto, Hong Lie Shen

Proceedings Volume 3550, Laser Processing of Materials and Industrial Applications II; (1998) https://doi.org/10.1117/12.317946
Event: Photonics China '98, 1998, Beijing, China

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.

Citation Download Citation

Mamoru Okutomi, Akira Obara, Koichi Tsukamoto, and Hong Lie Shen "Hardening and microstructure of aluminum metal surface by laser alloying process", Proc. SPIE 3550, Laser Processing of Materials and Industrial Applications II, (15 August 1998); https://doi.org/10.1117/12.317946

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