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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Environmentally Assisted Cracking: Theory and Practice
Presentation Title Correlating Crack Tip pH to Corrosion Fatigue Performance in Al Alloys
Author(s) Jenifer S. Locke, Katrina Catledge, Gabriella C Montiel, Mary E Cefaratti, David Schrock, Saba Nava Esmaeely
On-Site Speaker (Planned) Jenifer S. Locke
Abstract Scope For AA5xxx Al alloys, large cathodic polarizations have been shown to arrest both stress corrosion and corrosion fatigue cracking. Recent research suggests this arrest is due crack tip blunting. The current leading hypothesis for crack tip blunting in sensitized AA5xxx Al alloys loaded in aqueous chloride solutions and placed under cathodic polarization is increased cathodic reactions along the crack wake creating alkaline conditions that facilitate a breakdown of crack wake passivity and subsequent corrosion induced blunting of the crack tip. Research is ongoing to measure the crack tip pH of sensitized AA5xxx Al alloys under freely corroding conditions and several cathodic polarizations to produce results that either support or refute the alkaline corrosion crack tip blunting hypothesis. This talk will discuss this work as well as the methodology used for actively measuring crack tip pH while controlling K and measuring da/dN or da/dt depending on the loading spectrum applied.
Proceedings Inclusion? Planned:
Keywords Aluminum, Environmental Effects, Mechanical Properties

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An Investigation of Stress Corrosion Cracking Performance for Naturally Aged 5xxx Alloys
Atomistic Study on Diffusion and Trapping of Hydrogen in Nanocrystalline Steel
Capturing the effect of environment and electrochemistry on crack growth of metals and alloys using density functional theory
Cold Spray Process to Combat Potential Stress Corrosion Cracking in Used Nuclear Fuel Storage Stainless Steel Canisters
Composition and Morphology of C1018 Carbon Steel Coupons Retrieved from High Temperature Water Injection Well
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Correlating Crack Tip pH to Corrosion Fatigue Performance in Al Alloys
CORROSION AND MECHANICAL CHARACTERIZATION OF FRICTION-STIR WELDED JOINTS BETWEEN ALUMINUM AND MAGNESIUM ALLOYS
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Design and experimental validation of hydrogen trapping features in nickel alloys
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EAC susceptibility of differently aged high zinc 7068 T6 alloy
Effect of grain boundary character on chloride-induced transgranular stress corrosion cracking propagation in an austenitic stainless steel
Effect of irradiation on the cracking behavior of stainless steels in light water reactor environment
Effect of Water on Localized Corrosion and Stress Corrosion Cracking of Stainless Steels in Chloride Environments
Effects of Atmospheric Corrosion onCorrosion Fatigue if of AA7085-T7451: Investigating the Role of Surface Salts, Varied Humidity, and Temperature
Effects of Test Orientation on Environmentally-Assisted Cracking of 5xxx Series Aluminum Alloys
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Environmental creep behavior of a 9Cr martensitic steel in CO2 and air
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Fully coupled mechano-electrochemical microstructure-dependent fracture model of Mg alloys
Hydrogen-Induced Cracking of Pure Titanium in Hydrochloric Acid Solution Using Constant Load Method
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Hydrogen embrittlement in Ni-base superalloy 718
In-situ SEM investigation of chemo-mechanical effects on cutting-induced mixed-mode II-III fracture of martensitic stainless steel
In Situ Experiments to Reveal Coupling Between Stress and Hydrogen on Stress Corrosion Cracking of Fe-based Alloys
Investigating the Effect of Polarization on SCC Resistance of AA6111 and the Role of Crack Tip pH
Investigation of Fundamental Mechanical and Electrochemical Mechanism During the Tribocorrosion Process of Aluminum using Experiments and Simulations
Mechanisms of Mitigating Chloride-Induced Stress Corrosion Cracking of Austenitic Steels by Laser Shock Peening
Mitigation of Stress Corrosion Cracking in Al-Mg via Laser Shock Peening
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Multiscale modeling of fatigue crack growth and environmental effects
New insights into the impact of hydrogen on monotonic/cyclic plasticity in nickel single crystal based on nanoindentation investigation
On the critical role of localized oxidation processes in high temperature failures under cyclic thermomechanical loading conditions
Optimization of Stress Corrosion Mitigation in Al-Mg via Zn-Rich Primers
Peening Technologies to Mitigate Initiation and Resurgence of Stress Corrosion Cracking in Dry Cask Storage Stainless Steel Canisters
Physics-based Modeling of Corrosion Crack Dynamics and Fracture: A Case for Meshless Peridynamics Approach
Predicting Electrochemical Conditions in a Stress Corrosion Crack Tip and the Influence of Exposure Environment
Recent Developments in Coupled In-situ Transmission Electron Microscopy to Better Understand Materials Degradation
Recent Progress on Modeling Corrosion Damage with Peridynamics
Relating localized corrosion rates to microstructure in pure Al exposed to salt water environments
Role of Accumulated Plastic Strain on Grain Boundary Corrosion of Steel
Sensitization Responses along Different Directions of 5XXX Series Aluminum Alloy Plate Microstructures
Stress corrosion cracking behavior of Mg-Al-Zn alloys in humid air
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Ab initio study of hydrogen embrittlement in binary nickel alloys

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