UM  > Faculty of Science and Technology  > DEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Cavitation erosion and corrosion behaviour of laser surface melted 316L stainless steel
C. T. Kwok1; F. T. Cheng1; H. C. Man2
1997-12
Conference NameLaser Materials Processing Conference
Source PublicationProceedings of the 1997 Laser Materials Processing Conference, ICALEO'97
Volume83
Issue2
PagesF98-F107
Conference Date17-20 November 1997
Conference PlaceSan Diego, CA, USA
CountryUSA
PublisherLASER INST AMERICA, 12424 RESEARCH PKWY, STE 130, ORLANDO, FL 32826 USA
Abstract

Cavitation erosion is a form of erosive wear occurring on the metal surface which encounters high fluid flow velocity. Typical examples of cavitation erosion can be found on high speed impellers, pump casings, ultrasonic mixers in the food and pharmaceutical industries, etc. Austenitic stainless steels AISI 316L is widely used as pumping components for marine and urban water supply systems. 316L stainless steel has poor cavitation erosion resistance despite its high pitting corrosion resistance in marine condition. Surface modification of 316L stainless steel was achieved by surface melting the specimens by a 2 kW CW Nd-YAG laser to produce a rapidly quenched surface layer. The cavitation erosion characteristic of laser surface melted 316L stainless steel was studied by means of a 20 kHz ultrasonic vibrator at a peak-to-peak amplitude of 30 μm in 3.5% NaCl solution at temperatures 23° and 50 °C. Its pitting corrosion behaviour was also studied at 23 °C by electrochemical method. The cavitation erosion resistance of 316L stainless steel was found to be improved by 22% at 23 °C after laser melting. The pitting potential of laser melted 316L also increased from 359 to 452 mV at 23 °C. The deformation mechanism by cavitation erosion and the pitting morphology of laser melted 316L stainless steel were also be examined.

DOIhttps://doi.org/10.2351/1.5059710
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Materials Science ; Optics
WOS SubjectEngineering, Manufacturing ; Materials Science, Multidisciplinary ; Optics
WOS IDWOS:000073607300103
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Document TypeConference paper
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Affiliation1.Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People’s Republic of China
2.Department of Manufacturing Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People’s, Republic of China
Recommended Citation
GB/T 7714
C. T. Kwok,F. T. Cheng,H. C. Man. Cavitation erosion and corrosion behaviour of laser surface melted 316L stainless steel[C]:LASER INST AMERICA, 12424 RESEARCH PKWY, STE 130, ORLANDO, FL 32826 USA,1997:F98-F107.
APA C. T. Kwok,F. T. Cheng,&H. C. Man.(1997).Cavitation erosion and corrosion behaviour of laser surface melted 316L stainless steel.Proceedings of the 1997 Laser Materials Processing Conference, ICALEO'97,83(2),F98-F107.
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