Application of Response Surface Methodology for Modeling of Laser Transformation Hardening of Commercially Pure Titanium ASTM Grade3

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Authors

  • Duradundi Sawant Badkar
     School of Mechanical Engineering, Dr. A. D. Shinde Institute of Technology, Guddai, Bhadgaon − 416502, Gadhinglaj, Kolhapur, Maharashtra ,IN

DOI:

https://doi.org/10.18311/jsst/2019/18088

Keywords:

Analysis of Variance, Bead Geometry, Full Factorial Design, Laser Transformation Hardening, Response Surface Methodology
MATERIALS SCIENCE, METALLURGY AND SURFACE ENGINEERING

Abstract

In the presented study, the laser transformation hardening of commercially pure titanium sheet material of thickness being 1.6mm is investigated using CW, 1.6 kW solid State Nd: YAG laser. A Full Factorial Design (FFD) with Response Surface Methodology (RSM) is employed to establish, optimize and to investigate the relationships of three laser transformation hardening process parameters such as laser power, scanning speed, and focused position on laser hardened bead profile parameters such as hardened bead width, hardened depth, heat input and power density. In this work, Laser Transformation Hardening (LTH) with high precision and an optimum desired minimum value of hardened depth of 241 microns has been accomplished with heat input = 150 J/cm and power density = 294.08 W/mm2 for the laser process parameters of lower beam power: 750 Watts, high scanning speed: 3000 mm/min and a defocused beam of –30 mm. Effects of laser process parameters on laser hardened bead geometries were carried out using RSM. Results indicate that the scanning speed has a positive effect on all hardened bead dimensions while the laser power has a positive effect particularly on hardened bead width as compared to hardened depth and heat input. The optimum laser hardening conditions are identified sequentially to minimise hardened depth, heat input, power density and maximum hardened bead width. The validation results demonstrate that the developed models are accurate with low percentages of error.

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Published

2020-01-31

How to Cite

Sawant Badkar, D. (2020). Application of Response Surface Methodology for Modeling of Laser Transformation Hardening of Commercially Pure Titanium ASTM Grade3. Journal of Surface Science and Technology, 35(3-4), 97–106. https://doi.org/10.18311/jsst/2019/18088

Issue

Volume 35, Issue 3-4, December 2019

Section

Articles
Crossref
Scopus
Google Scholar
Europe PMC
Received 2017-10-09
Accepted 2018-09-07
Published 2020-01-31

 

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