Research on Laser Hardened Bead Geometry in Laser Hardening Parameters of ASTM Grade3 Pure Titanium

Authors

  • Duradundi Sawant Badkar

DOI:

https://doi.org/10.37591/rrjophy.v6i1.417

Abstract

Abstract
In the presented study, the laser transformation hardening of commercially pure titanium sheet material of thickness being 1.6 mm is investigated using CW (continuous wave) 1.6 kW solid state Nd:YAG laser. Commercially pure titanium has widespread application in various fields of industries including the medical, nuclear, automobile and aerospace. 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. RSM is used to develop pseudo-closed-form models from the computational parametric studies. Effects of laser process parameters: laser power, scanning speed and focal point position on laser hardened bead geometries such as hardened bead width, hardened depth and heat input were carried out using RSM. Results indicate that the scanning speed and laser power have the significant effect as compared to the focal point position on the laser hardening process parameters. The scanning speed has a positive effect on all responses while the laser power has a positive effect particularly on hardened bead width and as compared to hardened depth and heat input. The optimum laser hardening conditions are identified sequentially to minimise hardened depth, heat input, and maximum hardened bead width. The validation results demonstrate that the developed models are accurate with low percentages of error (less than 7.409%).
Keywords: Laser transformation hardening; response surface methodology; full factorial design; analysis of variance; bead geometry

Cite this Article
Duradundi Sawant Badkar. Research on Laser Hardened Bead Geometry in Laser Hardening Parameters of ASTM Grade3 Pure Titanium. Research & Reviews: Journal of Physics. 2017; 6(1): 22–37p.

Downloads

Published

2018-04-20

Issue

Vol. 6 No. 1 (2017)

Section

Research Article

License

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

  • I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
  • I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
  • I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
  •  I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. ________________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.