High Strength Steel Weldment Reliability: Weld Metal Hydrogen Trapping.
Abstract
The potential use of weld metal hydrogen getters (traps) to increase the reliability of high strength steel weldments was investigated. This research aimed to establish a fundamental understanding of the trapping mechanisms in weld metal and to evaluate the effectiveness of irreversible traps introduced by specific alloying additions, in comparison to the reversible hydrogen trapping by weld metal constituents and solidification substructure. The work involved: (1) fundamental calculations to select most promising elemental trapping additions to be made through the welding consumable, (2) evaluations of hydrogen-contaminated welds to determine the relative amount of hydrogen trapping, (3) evaluations of the influence of welding parameters and practice (multiple-pass welding) on the effective use of weld metal hydrogen gettering, and (4) demonstrations of the potential of using gettering additions to welding consumables to control weld metal hydrogen and thus reduce susceptibility to cold cracking in high strength steel weldments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1998
- Accession Number
- ADA344434
Entities
People
- David L. Olson
Organizations
- Colorado School of Mines