Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Analysis of Eddy Formation and Heat Transfer Process in Weld Pool during Plasma Keyhole Arc Welding

Version 1 : Received: 19 March 2020 / Approved: 20 March 2020 / Online: 20 March 2020 (13:03:13 CET)

How to cite: Van Anh, N.; Huu Manhh, N.; Thanh, T.; Tran, D.; Nguyen, H.T. Analysis of Eddy Formation and Heat Transfer Process in Weld Pool during Plasma Keyhole Arc Welding. Preprints 2020, 2020030317 (doi: 10.20944/preprints202003.0317.v1). Van Anh, N.; Huu Manhh, N.; Thanh, T.; Tran, D.; Nguyen, H.T. Analysis of Eddy Formation and Heat Transfer Process in Weld Pool during Plasma Keyhole Arc Welding. Preprints 2020, 2020030317 (doi: 10.20944/preprints202003.0317.v1).

Abstract

This investigation aims to discuss the formation process of eddies and the heat transportation in plasma keyhole arc welding. In order to clarify this issue, the measurement of the convection inside the weld pool, the convection on the weld pool surface, also the temperature distribution on the weld pool surface were carried out. The results showed that two eddies were found in the weld pool, which is controlled mainly through the shear force by the plasma flow acting on the weld pool surface. The magnitude, extent and direction of the shear force are thought to be determined primarily by the variation of keyhole profile. The relative shape and strength of each eddy is largely changed depending on the change of the keyhole profile when nozzle diameter changed. These relative strengths of each eddy are considered to decisively govern the heat transport in the weld pool coinciding with the direction of eddies. A larger eddy near the lower part of the keyhole inside the weld pool was found out in the case of 1.6 mm, meanwhile a upward larger eddy was found out near the upper part of the keyhole inside the weld pool in the case of 2.4 mm.

Subject Areas

Plasma keyhole arc welding; X-ray observation; Heat transportation; Eddy; Convective pattern

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.