Assessing Heat-to-Heat Variations Affecting Mechanism Based Modeling of Hydrogen Environment Cracking (HEAC) in High Strength Alloys for Marine Applications: Monel K-500
Abstract
The objective of the proposed work was to inform, refine, and validate a recently developed mechanism based predictive model of Hydrogen Environment Cracking (HEAC) in high strength Alloys with a focus on Monel K-500. In this proposal, laboratory based material hydrogen environment assisted cracking (HEAC) data & hydrogen interaction data will be developed based on testing of material obtained from field returned heats ofaged Monel K-500 bolts or studs documented to have HEAC issues compared to such data on unfailed or commercially procured material all satisfying the QQ-N-286 specification. This comparison will serve to determine whether a recently developed & emerging predictive model of embrittlement for aged Monel K-500 fasteners subjected to cathodic polarization in marine environments must be modified to consider strong dependencies ofthe heat-to-heat or lot-to-iot variations in material when attempting to assess SCC lifetimes or whether the model is robust in this regard & instead should focus on general material, environmental and geometric factors such as applied electrochemical potential, remote stress, geometry and surface roughness.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 28, 2016
- Accession Number
- ADA626813
Entities
People
- James T. Burns
- John R. Scully
Organizations
- University of Virginia