Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20708
Title: Laser surfacing of brass with Ni-Cr-Al-Mo-Fe using various laser processing parameters
Authors: Tam, KF
Cheng, FT
Man, HC 
Keywords: Brass
Cavitation erosion
Corrosion
Laser surfacing
Ni-Cr-Al-Mo-Fe
Issue Date: 2002
Publisher: Elsevier
Source: Materials science and engineering. A, Structural materials : properties, microstructure and processing, 2002, v. 325, no. 1-2, p. 365-374 How to cite?
Journal: Materials science and engineering. A, Structural materials : properties, microstructure and processing 
Abstract: Brass (Cu-38%Zn) specimens were laser surface modified with Ni-Cr-Al-Mo-Fe (Ni-10%Cr-7%Al-5%Mo-5%Fe-1%B) using a 2 kW CW Nd: YAG laser. Successful laser surfacing was achieved with a power density around 70 W mm-2, a scanning speed in the range 15-35 mm s-1, and a 50% overlap of adjacent tracks. The hardness of the alloyed layer increased as the dilution ratio decreased. The cavitation erosion resistance, defined as the reciprocal of the mean erosion rate, of the modified specimens in 3.5 wt.% NaCl solution (pH 6) at 23 °C was improved by a factor in the range 2.47-4.60 compared with that of brass, and correlated well with the hardness. The improvement in the cavitation erosion resistance was attributed to the formation of hard boride phases in a ductile Ni-rich matrix. On the other hand, there was no significant improvement in the corrosion resistance.
URI: http://hdl.handle.net/10397/20708
ISSN: 0921-5093
EISSN: 1873-4936
DOI: 10.1016/S0921-5093(01)01484-8
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