The Paton Welding Journal, 2012, №05



2012 №05 (01)

2012 №05 (03)

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The Paton Welding Journal, 2012, #5, 8-11 pages  

EXPERIMENTAL STUDY OF THE MECHANISM OF HYDROGEN EMBRITTLEMENT OF METALS WITH THE BCC LATTICE

V.S. SINYUK, I.K. POKHODNYA, A.P. PALTSEVICH and A.V. IGNATENKO

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
The study gives results of investigations of the effect of hydrogen on the mechanism of metal fracture. In metal containing diffusible hydrogen, plastic deformation leads to formation of residual hydrogen, which is connected to formed dislocations and microcracks. The presence of hydrogen connected to dislocations leads to localisation of plastic deformation of metal. Initiation of microcracks occurs by the shear mechanism, and their further growth takes place due to formation of new defects at the old crack apex and their coalescence.
 
 
Keywords: arc welding, low-carbon steel, hydrogen embrittlement, diffusible and residual hydrogen, hydrogen localisation of ductility
 
 
Received:                05.02.12
Published:               28.05.12
 
 
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