Analysis of metal transfer and weld geometry in hot-wire GTAW with indirect resistive heating

Research output: Contribution to journalResearch articleContributedpeer-review


In this publication, the different metal transfer modes of a hot-wire GTAW process with indirect resistive preheating of the wire are presented. The hot-wire GTAW process is characterized by an additional preheating unit that is used to heat the wire before it reaches the melt pool. Thus, to preheat the wire, the contact between the melt pool and the wire is not necessary. In order to examine the metal transfer of the wire, deposition welds are analysed using a high-speed camera with a laser light source as well as a data acquisition unit. The presented results comprise the impact analysis of the GTAW current, the hot-wire current, the wire feeding rate, the wire feeding angle as well as the wire feeding direction. The observed metal transfer modes can be characterized as either a constant melting bridge (cmb) between the wire and the melt pool or a recurring melting bridge (rmb). The analysis also reveals that the influence of the process parameters and thus the metal transfer mode on the bead properties is only marginal.


Original languageEnglish
Pages (from-to)2109-2117
Number of pages9
JournalWelding in the world
Issue number12
Early online dateSept 2020
Publication statusPublished - Dec 2020

External IDs

Scopus 85090185014
ORCID /0000-0003-2458-0495/work/142239327



  • Gtaw, Hot-wire, Metal transfer, Tig, Waam