A study of optimal laser parameters by anova method in laser surface alloyed NiTi with Mo

K. W. Ng, Hau Chung Man, Tai Man Yue

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

Abstract

The present work investigates the influence of process parameters for laser surface alloying with molybdenum on Nickel Titanium, which is extensively used in medical devices industries. A systematic study of process parameters such as laser power, scanning velocity and pre-paste thickness upon the Mo concentration was carried out. Analysis of variance (ANOVA) was used to understand the significance of the process variables affecting the process factors. A functional relationship between the melt profile, structure and micro hardness was identified after a detailed analysis of the variables involved. Laser power and scan speed are found to be most significant process parameters influencing the melt depth. The weight % of Mo and of Ni are directly and inversely proportional to the dilution ratio (DR) respectively. A favorable hardness value can be achieved by an attainable Mo content. With a set of optimal parameters, Mo alloyed layer with hardness three times the substrate NiTi was achieved.
Original languageEnglish
Title of host publication26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007 - Congress Proceedings
Publication statusPublished - 1 Dec 2007
Event26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007 - Orlando, FL, United States
Duration: 29 Oct 20071 Nov 2007

Conference

Conference26th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2007
CountryUnited States
CityOrlando, FL
Period29/10/071/11/07

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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