Evaluation of the diffusivity and susceptibility to hydrogen embrittlement of API 5L X80 steel welded joints

• DOI: 10.1260/1750-9548.7.3.183
• Publication Date: 2013-09-04T02:07:00Z
• Authors: B. Araújo; T. Maciel; J. Carrasco; E. Vilar; A. Silva
• Keywords: Consumables; Embrittlement; Elongation; Tempering

This paper presents a study of susceptibility to hydrogen embrittlement API 5L X80 steel welded joints by SMAW and GTAW processes. By varying the consumables used use same interpass temperature three different were obtained. Tests performed according ASTM G129-2006 with an aqueous solution (Solution A - TM0177 / 2005 NACE) sodium thiosulfate (Na 2 S O 3 ) replacing bubbling H 2S. From elongation values ​​was observed that joint obtained in all welding conditions showed embrittlement, which was determined ratio. The higher levels hardness embrittlement. speeds for amount heat input presented reduction rate All tested fracture surfaces quasi cleavage zones.