Advances of orbital gas tungsten arc welding for Brazilian space applications - experimental setup

Garcia, José Augusto Orlowski de; Dias, Nilton Souza; Lima, Gérson Luiz de; Pereira, Wilson D. Bocallão; Nogueira, Nivio Fernandes

doi:10.5028/jatm.2010.02026610

Cited by 8 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The principle advantage of the sleeve fitting is the added reliability; thin-walled tubes are particularly challenging to join and whilst tube-to-tube butt joinery is feasible to perform in a lab environment, the transfer into industrial production greatly benefits from the inclusion of the sleeve. This sleeve thus serves as an improvement compared to butt joints of thin-walled tubes and is successfully demonstrated on thinner-walled tubing than reported previously [8]. Reliability is the main challenge when welding thin-walled tubing; many welding machines are not optimized for the required low amperages of thin-walled tube welding so welding procedures are awkward to translate between different machines.…”

Section: Discussionmentioning

confidence: 90%

“…Reports on thin-walled tube CP-2 joinery are very limited and, to the author's knowledge, only address wall thicknesses above 500 µm. de Garcia et al [8] joined 6 mm OD, 1 mm wall thickness, CP-2 Ti tubing for a satellite propulsion system using orbital GTAW welding with internal pressurization to join the tubing. However, for alignment, they manually tacked the tubes together.…”

Section: Jinst 15 P06022mentioning

confidence: 99%

See 1 more Smart Citation

In situ micro gas tungsten constricted arc welding of ultra-thin walled 2.275 mm outer diameter grade 2 commercially pure titanium tubing

Cooper¹,

Crouvizier²,

Edwards³

et al. 2020

J. Inst.

View full text Add to dashboard Cite

Ultra-thin walled cooling tubes for heat exchangers and condenser units have applications in multiple high-value manufacturing industries. Grade 2 commercially pure titanium (CP-2 Ti) requires far less mass to achieve the same mass flow handling abilities as stainless steel tubing yet it is more challenging to join, particularly at wall thicknesses less than 500 μm (termed ultra-thin walled tube). This paper presents a single-pass joinery method that produces reliable welds on 2.275 mm outer diameter (OD), 160 ± 10 μm wall thickness tubing with a service life of 20 of more years. This is achieved through an automated orbital gas tungsten constricted arc welding (GTCAW) process incorporating enveloping low-mass sleeves used in tandem with a buttressing internal gas pressure to support the molten metal and maintain consistent internal diameter inside the tube. The industrial applicability is demonstrated through the production of a 1:1 scale mock-up of a fixed geometry CO2 cooling circuit for a next-generation particle detector. The tensile strengths of the joints, 403.8 ± 4.2 MPa, exceed the tensile strength of the parent CP-2 Ti.

show abstract

Section: Discussionmentioning

confidence: 90%

Section: Jinst 15 P06022mentioning

confidence: 99%

In situ micro gas tungsten constricted arc welding of ultra-thin walled 2.275 mm outer diameter grade 2 commercially pure titanium tubing

Cooper¹,

Crouvizier²,

Edwards³

et al. 2020

J. Inst.

View full text Add to dashboard Cite

show abstract

“…The work of de Garcia et al [17] involved welding 1 mm wall thickness, 6 mm OD, titanium tubing for a satellite propulsion system using orbital GTAW with internal pressurization. Whilst this work does demonstrate the need for internal pressurization, a manual tacking process was used for tube alignment.…”

Section: Thin Tubementioning

confidence: 99%

Multiphysics modelling of Gas Tungsten Arc Welding on ultra-thin-walled titanium tubing

Yeadon¹

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Além do setor de óleo e gás, esse processo encontra aplicabilidade no setor aeroespacial devido à grande responsabilidade relacionada às soldas submetidas às altas pressões, fazendo-se necessário alto nível de qualidade e reprodutibilidade, difíceis de serem alcançados por processos de soldagem manuais [9][10][11][12].…”

Section: Influência Da Posição E Dos Parâmetros De Soldagem Na Soldagunclassified

Influência da Posição e dos Parâmetros de Soldagem na Soldagem TIG Orbital Aplicada a Tubulações de Aço Baixo Carbono

et al. 2015

View full text Add to dashboard Cite

Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado. Influence of Orbital TIG Welding Position and Welding Parameters Applied to Low Carbon Steel PipesAbstract: The most important characteristic of TIG Orbital welding is the constant change in weld position while the torch follows the geometric profile of the pipes. In this context, large diameter and thick wall pipes orbital TIG welds were investigated, by studying the relation between the welding position, use of constant or pulsed current and magnitude of welding current and the resulting geometric characteristics. Weld beads were made on SAE 1020 carbon steel pipes, as well as transversal section macrographs via optical micrograph. High definition filming contributed to comprehension of the weld pool trend on different welding positions. Geometric characteristics were quantified through the macrographs by using software, and its relations with the cited variables were made. Besides that, a microstructural analysis was made, comparing it to Vickers micro hardness. One could conclude that beads made with pulsed current had higher reinforcement and width, as well as higher hardness and a finer microstructure. The ascendant vertical position resulted in low reinforcement form factor and higher penetration, and the overhead position results in low reinforcement form factor beads.

show abstract

Advances of orbital gas tungsten arc welding for Brazilian space applications - experimental setup

Cited by 8 publications

References 4 publications

In situ micro gas tungsten constricted arc welding of ultra-thin walled 2.275 mm outer diameter grade 2 commercially pure titanium tubing

In situ micro gas tungsten constricted arc welding of ultra-thin walled 2.275 mm outer diameter grade 2 commercially pure titanium tubing

Multiphysics modelling of Gas Tungsten Arc Welding on ultra-thin-walled titanium tubing

Influência da Posição e dos Parâmetros de Soldagem na Soldagem TIG Orbital Aplicada a Tubulações de Aço Baixo Carbono

Contact Info

Product

Resources

About