Development of a regression model relating experimentally measured arc parameters and gas tungsten arc welding process variables Online publication date: Sat, 21-Jun-2014
by Sanjivi Arul; R. Sellamuthu
International Journal of Computational Materials Science and Surface Engineering (IJCMSSE), Vol. 5, No. 2, 2013
Abstract: In order to solve the heat transfer model of GTA welding process, the physical and the thermal properties of the workpiece, the heat source efficiency and the area of heat incident on the workpiece surface are required. In this work, the arc dimensions were measured experimentally with respect to current, speed, electrode tip angle and electrode distance for autogenous GTA welding. The arc parameters were fitted against welding variables using regression analysis. The projected arc area is found to increase with current and electrode distance and to decrease with electrode tip angle whereas it is found to be independent of speed. The shape of the projected arc area is observed to be semi-circular in the front and semi-elliptical in the rear for moving heat source. The regression equation developed can be readily applied in estimating the area of heat incident for solving the heat transfer equation.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Computational Materials Science and Surface Engineering (IJCMSSE):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook