Laser surfacing of AISI 316 stainless steel using NiTiCu for enhancing cavitation erosion resistance

F. T. Cheng, K. H. Lo, Hau Chung Man

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Laser surfacing of AISI 316 stainless steel was achieved by a two-step process. NiTiCu powder of particle size about 70 μm was preplaced on steel samples and scanned by a high-power CW Nd:YAG laser to form a modified layer of a few hundred μm thick. The microstructure of the laser-modified layer and the morphology of the damaged surface after cavitation were studied by optical microscopy. The phases present were analyzed by X-ray diffractometry (XRD). The cavitation erosion behavior in 3.5% NaCl solution was studied using an ultrasonic vibratory facility. Using appropriate processing parameters, the cavitation erosion resistance of the laser-treated sample was increased by more than 10 times compared with the substrate, though some defects were present. The improvement in erosion resistance was explained in terms of the phases formed in the modified layer.
Original languageEnglish
Title of host publicationICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings
Publication statusPublished - 1 Dec 2003
EventICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics - Jacksonville, FL, United States
Duration: 13 Oct 200316 Oct 2003

Conference

ConferenceICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics
CountryUnited States
CityJacksonville, FL
Period13/10/0316/10/03

Keywords

  • AISI 316
  • Cavitation erosion
  • Laser surfacing
  • NiTi alloys

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Electrical and Electronic Engineering

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