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Meeting MS&T22: Materials Science & Technology
Symposium Resisting Degradation from the Environment: A Symposium Honoring Carolyn M. Hansson’s Research and Pioneering Experiences as a Woman in STEM
Presentation Title Correlating Crack Tip pH to Environment Assisted Cracking Performance in Al Alloys
Author(s) Jenifer S. Locke, Katrina Catledge, Gabby Montiel, Gabriella Marino
On-Site Speaker (Planned) Jenifer S. Locke
Abstract Scope Environment assisted cracking is driven by both mechanical and environmental driving forces for cracking that exist at a crack tip. The environmental driving forces at the crack tip, while related to the external environment, are predicted to deviate greatly from those that exist in the bulk environment. The literature contains modeling studies that predict the deviations of crack tip pH and potential from the bulk environment, but only limited experimental information exists. The discussed research spans several Al alloy systems loading in both corrosion fatigue and stress corrosion cracking scenarios to understand how and if performance changes are linked to changes in crack tip pH. For example, in sensitized 5xxx Al alloys large cathodic polarizations under low frequency corrosion fatigue led to crack arrest, which was linked to the development of a basic crack environment likely due to increased cathodic reaction kinetics in the crack wake.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Characterization of Internal Oxidation in Alloy 690 and Model Ni Alloys
Correlating Crack Tip pH to Environment Assisted Cracking Performance in Al Alloys
Corrosion and Biocompatibility of 316L Stainless Steels Fabricated by Selective Laser Melting
Corrosion and Environmentally Assisted Cracking (EAC) Evaluation of Additively Manufactured (AM) High Strength Precipitation Hardened Steel (UNS S17400)
Corrosion of Fe-Cr-Mn Stainless Steel in Supercritical Water
Evaluating the Sensitivities of SCC Susceptibility in Stainless-steel Nuclear Waste Storage Containers
Galvanic Corrosion of Active and Passive Steel Bars with Different Area Ratios
Investigation of Crack Initiation in Hydrogen Embrittled Ni-base Alloy 725
Liquid Metal Embrittlement: Cracking Open the Disparate Mechanisms
Oxidation Behavior of Model FeCrAl Steel and APMT Alloy After Exposure in Steam
Quantifying the Environmentally Assisted Cracking Initiation and Short Crack Behavior in New Generation 7xxx Aluminium
Relating Microstructure to Environmental Degradation in Al-Mg Alloys
The Effect of Microstructural Surface States on the Corrosion of Additively Manufactured 316 Stainless Steel

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