Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20134
Title: Cavitation erosion and pitting corrosion of laser surface melted stainless steels
Authors: Kwok, CT
Man, HC 
Cheng, FT
Keywords: Austenitic stainless steels
Cavitation erosion
Corrosion
Laser surface melting
Super duplex stainless steel
Issue Date: 1998
Source: Surface and coatings technology, 1998, v. 99, no. 3, p. 295-304 How to cite?
Journal: Surface and Coatings Technology 
Abstract: Surface modification of austenitic stainless steels S31603, S30400 and super duplex stainless steel S32760 was achieved by laser surface melting using 2 kW continuous wave Nd-YAG laser. The cavitation erosion and corrosion characteristics of laser surface melted stainless steels in 3.5% NaCl solution at 23°C were studied by means of a 20 kHz ultrasonic vibrator at a peak-to-peak amplitude of 30 mm and a potentiostat respectively. In a series of 4 h cavitation tests, the cavitation erosion resistance of laser-melted S31603 with 50% overlapping of melted tracks was found to be improved by 22% at 23°C as compared with the as-received specimen and very close to that of the as-received S30400. No improvement on the cavitation erosion resistance of S30400 and S32760 was found. The pitting potential of laser-melted S31603 increased from 359 to 452 mV at 23°C. The deformation mechanism by cavitation and the pitting morphology of the laser-melted stainless steels were discussed in terms of microstructure and residual stress.
URI: http://hdl.handle.net/10397/20134
ISSN: 0257-8972
DOI: 10.1016/S0257-8972(97)00624-5
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