Investigation of low current gas tungsten arc welding using split anode calorimetry

Most previous split anode calorimetry research has applied high weld currents which exhibit pseudo Gaussian distributions of arc current and power density. In this paper we investigate low current arcs and show that both the current and power distributions have minima in the centre - varying signifi...

Full description

Saved in:
Bibliographic Details
Published in:Science and technology of welding and joining 2017-01, Vol.22 (1), p.71-78
Main Authors: Egerland, S., Colegrove, P., Williams, S.
Format: Article
Language:English
Subjects:
Arc energy
Current density
Electrode
GTAW
Power density
Split anode
Weld calorimetry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Most previous split anode calorimetry research has applied high weld currents which exhibit pseudo Gaussian distributions of arc current and power density. In this paper we investigate low current arcs and show that both the current and power distributions have minima in the centre - varying significantly from the expected Gaussian profile. This was postulated due to the formation of the arc with the copper anode and the tungsten cathode. Furthermore, a number of parameters were varied including the step size between measurements, anode thickness and anode surface condition as well as cathode type and tip geometry. The step size between measurements significantly influenced the distribution profile and the anode thickness needed to be above 7 mm to obtain consistent results.
ISSN:1362-1718
1743-2936
DOI:10.1080/13621718.2016.1189214