Effect of shielding gas composition on the properties of hyperbaric GMA welds in duplex steels

Book · Sat Dec 31 00:00:00 EST 1994

OSTI ID:27953

Ware, N; Dos Santos, J F ^[1]; Richardson, I ^[2]

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1. GKSS Forschungszentrum Geesthacht GmbH (Germany). Inst. fuer Anlagentechnik
2. Cranfield Univ., Bedford (United Kingdom). School of Industrial and Manufacturing Science

By using Ar/He based shielding gas mixtures with a variety of oxygen and nitrogen additions the absorption of active gas components into duplex stainless steels welded under hyperbaric conditions was examined. The pressure levels used corresponded to seawater depths of 100m, 200m and 300m. The GMAW process in the short circuit transfer mode was used for all tests. Both bead-on-plate and ``V`` butt joints were carried out. The effect of variations in the weld metal active gas components on the weld metal chemical composition and phase balance was investigated. In a second set of tests the effect of varying heat inputs on the phase balance and microstructure was assessed.

• OSTI ID: 27953
• Report Number(s): CONF-940230-; ISBN 0-7918-1266-9; TRN: IM9516%%79
• Resource Relation: Conference: 13. international conference on offshore mechanics and Arctic engineering (OMAE-13), Houston, TX (United States), 27 Feb - 3 Mar 1994; Other Information: PBD: 1994; Related Information: Is Part Of OMAE 1994. Volume 3: Materials Engineering; Salama, M.M.; Toyoda, Masao; Lui, S.; Dos Santos, J.F.; Kocak, M.; Patterson, E.A.; Berge, S. [eds.]; PB: 438 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
STAINLESS STEELS
WELDED JOINTS
CHEMICAL COMPOSITION
GAS METAL-ARC WELDING
MICROSTRUCTURE
GAS ANALYSIS
OXIDATION
MASS SPECTROSCOPY
OPTICAL MICROSCOPY
METALLOGRAPHY
EXPERIMENTAL DATA