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Meeting MS&T25: Materials Science & Technology
Symposium Understanding Corrosion-Related Cracking
Presentation Title Understanding the ability of combined effects corrosion fatigue accelerated testing to properly reflect in-service performance for aerospace Al alloys
Author(s) Jenifer S. Locke, Olivia Underhill, Brandon Free, Daniel Egbuzie, Jason Niebuhr, Sarah Galyon Dorman, Christopher Taylor
On-Site Speaker (Planned) Jenifer S. Locke
Abstract Scope This work is part of a larger collaborative effort aimed at advancing life prediction models by utilizing machine learning and a Bayesian network cumulative probability approach. The research discussed here will focus on corrosion fatigue (CF) testing of Al-Mg-Cu-Zn alloys under atmospheric environments controlling surface salt deposits, relative humidity, and temperature aimed at understanding how conventional full immersion testing may not accurately predict service CF damage accumulation. Testing on AA7085-T7451 with only NaCl deposited on the surface has shown the acceleration in fatigue crack growth rate from the environment persists to higher fatigue loading frequencies than predicted by testing under full immersion. Tests are on-going examining AA7075-T6 and complex sea salt that more closely approximate near seacoast atmospheric conditions. Current experimental progress and how data and outdoor testing a will be utilized to understand the most critical environmental parameters and be utilized in modelling efforts will be discussed.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Effect for hydrogen embrittlement and sulfide stress cracking in HSLA carbon steel when exposed to H2S environments
Effect of deposit chemistry on the stress corrosion cracking susceptibility of CMSX-10 at 550°C and 700°C
Environmentally Assisted Cracking in Ni-based Superalloys
First Experimental Evidence of Liquid Metal Embrittlement of Two Titanium Alloys by Lithium
Impact of alloy composition and liquid chemistry on cracking susceptibility of fusion candidate structural materials in liquid lithium
Influence of Cold Work on Environmentally Assisted Cracking of a Single Crystal Nickel Based Superalloy CMSX-4
Influence of crack environment pH on Corrosion Fatigue Crack Growth in Aerospace Aluminum Alloys
Misch Metal-Induced Corrosion Resistance Enhancement in Ti-Based Amorphous Powders
Phase-Field Modeling of Oxidation and Cracking in Environmental Barrier Coatings
Pre-crack Degradation Pathways of NaCl-assisted Hot Corrosion of a 2nd Generation Ni-based Superalloy
Predicting Environmentally Assisted Fatigue Crack Growth in AA7075 Using Machine Learning Approaches
Reduced graphene oxide as a protection layer for Al
Study of the Role of Hydrogen in the Cold-cracking of As-cast 7xxx Aluminum Alloys
Understanding Pit Morphological Features that Initiate SCC in SS304H used for Nuclear Waste Storage Canisters
Understanding the ability of combined effects corrosion fatigue accelerated testing to properly reflect in-service performance for aerospace Al alloys
Understanding the effect of tempering on sulfide stress cracking response in high-strength casing steel
Understanding the Role of Microstructure on the Sub Critical Crack Growth Rate and Crack Path in Pipeline Ferritic Stainless Steels
Understanding the Role of Microstructure on the Sub Critical Crack Growth Rate and Crack Path in Pipeline Ferritic Stainless Steels

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