The Paton Welding Journal, 2010, №05



2010 №05 (10)

2010 №05 (02)

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TPWJ, 2010, #5, 5-9 pages
 
PROBABLE MECHANISM OF CRACKING OF STABLE-AUSTENITIC WELDS CAUSED BY OXYGEN SEGREGATION


Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 5, 2010 (May)
Pages                      5-9
 
 
Authors
K.A. YUSHCHENKO, V.S. SAVCHENKO, N.O. CHERVYAKOV and A.V. ZVYAGINTSEVA
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Current concepts of the nature of formation of cracks classified as ductility-dip cracks in multilayer welds or HAZ of steels and alloys with single-phase structure have been reviewed. It is noted that the mechanism of formation of such cracks is a subject of discussion. A hypothesis of the probable influence of oxygen on the processes of intergranular fracture is set forth, as oxygen decreases cohesion strength of grain boundaries in the established temperature range and leads to intergranular fracture.
 
 
Keywords: arc welding, high-alloy steels, nickel alloys, welded joints, grain boundaries, ductility-dip cracks, cohesion energy, Auger-spectroscopy
 
 
Received:                ??.??.??
Published:               28.05.10
 
 
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