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Abstract

Hydrogen Distribution in Thick Weldment and its Change with Post-heating by Yasuhiro Nishio, Yasuyuki Yoshida and Yuzuru Miura This paper deals with the diffusible hydrogen in multilayer weldment with plate thickness 100 mm to 200 mm.

Hydrogen assisted cracking in C-Mn and low alloy steel weldments

“…16. 74 Terasaki et al 238 calculated the peak concentration of hydrogen in a multilayer weld, finding that the peak concentration increases with the number of welded layers but levels off after the deposition of approximately four layers.…”

“…16. 74 Hydrogen concentrated beneath the final weld layer, and a high level of hydrogen still remained 6 days after the welding. Method (4) can collect hydrogen by local fusion focused in a size less than 50 !lm.…”