Assessing Hydrogen Assisted Cracking Modes in High Strength Steel Welds
Abstract
The stress intensity which causes crack propagation in high strength steel weldments was quantified as a function of the hydrogen content at the crack location. This relationship was used to assess previously proposed theoretical hydrogen assisted cracking mechanisms. It was found that the microplasticity theory of Beachem can best describe how the stress intensity factor and hydrogen content affect the modes of intergranular, quasi-cleavage, and microvoid coalescence fracture. Implant test results were analyzed with the aid of fracture mechanics to determine the stress intensity associated with various modes of fracture. Diffusible weld hydrogen results were analyzed with the aid of hydrogen distribution model developed by Coe and Chano to determine the amount of hydrogen present at the crack location at the time of fracture. Keywords: High strength steel, Welding, Implant tests, Hydrogen embrittlement, Cracking (fracturing, Stress intensity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA205431
Entities
People
- Steven A. Gedeon
- Thomas W. Eagar