Study of the increase of penetration depth in tig welding of stainless steel

Code

L2-5262 (D) - included in ARIS records

Head

PhD Gabriel Janez Rihar

Period

1/1/2003 - 12/31/2004

Range in 2004

0.29 FTE

Science

Engineering sciences and technologies (5)
Other (1)

Reseacher status

Researcher (5)
Junior expert or technical associate (1)

Education

Doctor's degree (5)
Other (1)

Sex

Woman (1)
Man (5)

Status

Employed at RO and RRD (1)
No data on employment in RO (2)
Retired (3)

No. of publications

1–9 (1)
10–99 (1)
100–999 (4)

Projects / Programmes source: ARIS

source: ARIS

Study of the increase of penetration depth in tig welding of stainless steel

Research activity

Code	Science	Field	Subfield
2.10.00	Engineering sciences and technologies	Manufacturing technologies and systems

Code	Science	Field
T000	Technological sciences
T130	Technological sciences	Production technology
T150	Technological sciences	Material technology
T450	Technological sciences	Metal technology, metallurgy, metal products

Keywords

TIG welding, A-TIG welding, stainless steels, penetration depth, surface active elements, surface tension, testing of welded joints

Evaluation (rules)

source: COBISS

Evaluation of bibliographic research performance indicators according to ARIS methodology

Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases

source: WoS

source: Scopus

source: COBISS

Researchers (6)

no.	Code	Name and surname	Research area	Role	Period	No. of publicationsNo. of publications
1.	06073	PhD Milan Bizjak	Materials science and technology	Researcher	2003 - 2004	464
2.	17189	Nika Breskvar		Researcher	2003 - 2004	1
3.	00732	PhD Vasilij Gontarev	Materials science and technology	Researcher	2003 - 2004	179
4.	11624	PhD Borut Kosec	Materials science and technology	Researcher	2003 - 2004	978
5.	00217	PhD Gabriel Janez Rihar	Manufacturing technologies and systems	Head	2003 - 2004	230
6.	15842	PhD Janko Tomc	Mechanical design	Researcher	2003 - 2004	48

Organisations (2)

no.	Code	Research organisation	City	Registration number	No. of publicationsNo. of publications
1.	0209	Welding Institute	Ljubljana	5051398000	1,335
2.	1555	University of Ljubljana, Faculty of Natural Sciences and Engeneering	Ljubljana	1627074	19,861

Abstract

In literature the mode of increasing the penetration depth by adding surface-active elements is called the A-TIG process. The A-TIG welding process is a simple modification of the well-known TIG welding process, and takes advantage of some physical and chemical properties of the weld pool. The addition of surface-active elements (oxygen, fluorine, selenium, antimony, tellurium) results in a considerable reduction of the surface tension, which in turn, produces a change in the weld pool flow. With the same parameters, the depth of penetration can be increased. The project will involve a study of A-TIG welding of stainless steels with thicknesses ranging from 3 mm to 15 mm which have been, up to now, welded using the classical TIG process. Turning to account the effects of surface tension of the weld pool, it is expected to achieve a reduction of energy consumption, shortening of production times, and an easier control of the welding process in comparison to TIG welding. In the study, metallographical examinations, measurements of surface tension, a process analysis, measurements of energy distribution and of welding process efficiency, a microanalysis, shooting with a high-speed camera, and measurements of burn-off of the active elements added will be performed. The comparison of the two welding processes will show that the introduction of A-TIG welding to practical applications to replace the existing TIG welding process in Slovenian firms, where mostly stainless steels are welded, is justifiable.