Prevention of Hydrogen-Induced Cracking in HY-130 Weldments.
Abstract
The investigation was centered on the effect of preheat and postheat treatments on the hydrogen content and initiation and propagation of hydrogen-induced cracks in HY-130 weldments. The initiation and propagation of cracks in welds deposited using both the GMA and SMA processes were studied by the augmented strain cracking test (ASC test). The weld metal hydrogen contents for the various weld beads were determined by the BWRA/IIW technique. Cracking was found to depend on the base material, augmented strain, hydrogen content, and weld energy input used, but the relationships among these variables are complex. The measured hydrogen contents of the deposited welds were found to depend on the weld energy input, the bead size, and the preheat and postheat treatments. It was found that hydrogen-induced cracking was nucleated predominately along grain boundaries within the weld metal. However, some cracking was observed to be associated with elongated nonmetallic inclusions in the partially melted zone and the true heat-affected zone. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1977
- Accession Number
- ADA047195
Entities
People
- A. J. Silvia
- E. F. Nippes
- W. F. Savage
Organizations
- Rensselaer Polytechnic Institute