The Paton Welding Journal, 2012, №03



2012 №03 (03)

2012 №03 (05)

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The Paton Welding Journal, 2012, #3, 15-19 pages  

DISLOCATION MODEL OF HYDROGEN-ENHANCED LOCALIZING OF PLASTICITY IN METALS WITH BCC LATTICE

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

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
A mechanism of the influence of hydrogen-enhanced localizing of plasticity on the stage of initiation of a submicrodefect and growth of a macrocrack in metal with bcc lattice is proposed. A mathematical model of hydrogen embrittlement in metals with bcc lattice was constructed, which allows for the effect of hydrogen-enhanced localizing of plasticity and hydrogen influence on surface energy of a submicrocrack. It is established that metal susceptibility to hydrogen embrittlement is increased with grain size refinement.
 
 
Keywords: arc welding, welded joints, high-strength low-alloyed steels, hydrogen brittleness model, metals with bcc lattice, grain size, hydrogen-enhanced localizing of plasticity, brittle fracture
 
 
Received:                25.01.12
Published:               28.03.12
 
 
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