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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Environmentally Assisted Cracking: Theory and Practice
Presentation Title Effect of Microstructure on Stress Corrosion Cracking Behavior of Additively Manufactured 7050-based Aluminum Alloy
Author(s) Rupesh Rajendran, Crosby T Owens, Jeffrey D Eisenhaure, David Spain, Alex Kinsey, Preet M. Singh
On-Site Speaker (Planned) Rupesh Rajendran
Abstract Scope Aluminum alloy 7050 is well known candidate for aerospace applications due to its high strength to weight ratio, corrosion and stress corrosion cracking (SCC) resistance, and fracture toughness properties. However, there has been limited studies on understanding the SCC behavior of additively manufactured (AM) high strength aluminum alloys. This work investigates the SCC behavior of AM 7050-based aluminum alloys which were modified to promote equiaxed grain structures with minimal manufacturing-related defects. SCC behavior is studied using slow strain rate tests (SSRT) under dry air, NaCl, and oxidizing environments. The effect of microstructural differences on the SCC behavior as a result of different post-processing and aging conditions are also explored. Results show high SCC resistance of AM 7050-based alloys in general, compared with an equivalent wrought alloy. Post-SCC samples are characterized using SEM-EDS, EBSD, and fractography to correlate microstructural features responsible for higher SCC resistance in AM 7050-based aluminum alloy.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Aluminum, Environmental Effects

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Combined Micromechanics/Materials Science Approach to Understanding High Temperature Hydrogen Attack
A Comprehensive Study to Evaluate Sensitization of As-fabricated Coated TPBAR Cladding
A Mechanistic Study on Dealloyed-induced Stress Corrosion Cracking Initiation of Alloy 800
A Meshless Peridynamics Framework for Physics-based Modeling of Corrosion Crack Dynamics and Fracture
A Portable Solution to Corrosion Remediation of Sea Ships to Desensitize Severely Sensitized Aluminum Alloys Using Lasers
A Unified Fracture Criterion in Consideration of Hydrogen Effect in Martensitic Steel Sheet
Advancing the Understanding of the Impact of Atmospheric Environments on Corrosion Fatigue Crack Growth Rates of AA7085-T7451
Atomic-scale Analysis of Hydrogen Embrittlement in High-strength Al Alloys
Atomic Mechanism of Near Threshold Fatigue Crack Growth in Vacuum as a Basis for Understanding Environmental Effects
CISCC Repair & Mitigation Strategies in Nuclear Waste Storage Canisters
Cold Spray Deposition for Mitigation and Repair of Stress Corrosion Cracking in Used Nuclear Fuel Storage Stainless Steel Canisters
Coupled Analysis of Stress and Deformation Behavior in Transgranular Stress Corrosion Crack Tip Plasticity in Austenitic Stainless Steel
Creep Degradation of Austenitic Steels in CO2 Environment
Effect of Hydrogen on the Deformation of Austenitic Stainless Steels: A Stress Orientation Dependent Contribution?
Effect of Microstructure on Stress Corrosion Cracking Behavior of Additively Manufactured 7050-based Aluminum Alloy
Effect of Mo and W on Corrosion of Ni-superalloys
Effect of Nickel and Chromium Contents on Hydrogen Embrittlement of High Strength Bolt Steel for Offshore Plants
Environmentally Assisted Cracking of Nickel-Based Alloys in Molten Salts Containing Tellurium
Evaluation of the Responsible Hydrogen Embrittlement Mechanism in Martensitic Steels by Advanced Microstructural Characterization
Exploring Environmentally-Assisted Cracking in Liquid Metal and Molten Salt Advanced Reactor Coolant Environments
Hydrogen Effects on Mechanical and Toughness Properties of Pipeline Steels
Hydrogen Embrittlement in Alloys with Metastable Phases
Hydrogen Interactions and Transport in Additively Manufactured Structural Alloys: Implications for Stress Corrosion Cracking and Hydrogen Embrittlement
Improving Stress Corrosion Cracking of Type 304 Stainless Steel through Grain Boundary Engineering
In-situ Electron Microscopy Degradation in Extreme Environments
Influence of Pre-Deformation on High Temperature Oxidation of a Model Fe-Cr-Ni Alloy in Pressurized Water Reactor Environments
Investigation of Mechanical Properties of Corrosion Products in AA7075-T651 Using In Situ Nanoindentation
Liquid Metal Embrittlement Behavior of Dual-Phase Steels: The Influence of Microstructure and Strain Rate.
Localized Corrosion Behavior of Aged High Zinc 7068 Aluminium Alloy
Measuring Crack Tip pH to Elucidate Corrosion Fatigue Susceptibility Differences between Al-Cu-Mg and Al-Zn-Mg-Cu Alloys
Mechanical Behavior of Wrought Aluminum in Hydrogen Environments
Mechanistic Model for Hydrogen Accelerated Fatigue Crack Growth in a Low Carbon Steel
Mechanistic Understanding of Irradiation Assisted Stress Corrosion Cracking
Modelling Environmentally Assisted Cracking (EAC) in Ni-based Superalloys
Multiscale Modeling of Fatigue Crack Growth and Environmental Effects
On the Applied Potential Dependence of Environment-assisted Cracking Behavior of 7xxx-series Al Alloys in Marine Environments: Towards Informing Metal-rich Primer-based Mitigation Strategies
Peening Technologies to Mitigate Initiation and Resurgence of Stress Corrosion Cracking in Dry Cask Storage Stainless Steel Canisters
Phase Field Modelling of Stress Corrosion Cracking in Superalloys at High Temperature
Preventing the Sensitization in Aluminum Magnesium Alloys
Site Specific Multimodal In-situ Study of Early-Stage Corrosion of Model Fe-Cr-Ni Alloys Using Electrochemical Atomic Force Microscopy
Some Antagonist Processes of Hydrogen/Plasticity Interaction in fcc Metal Alloys: The Effect of Ni3Al Precipitate State on Nickel Base Alloys
Some Recent Advances on Hydrogen Embrittlement in Martensitic Steels: From Diffusion and Trapping of Hydrogen to Mechanisms of Damage
Susceptibility of Manganese Bronze to SCC in Water
The Impacts of Hydrogen on the Elasticity, Plasticity and Damage Mechanisms of Pure Nickel
Understanding Hydrogen Embrittlement Effects on the Deformation Mechanisms in Developmental Austenitic Steels
Understanding Sensitization Rate Effects on Stress Corrosion Cracking for 5xxx Marine Grade Aluminum Alloys
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Utilizing Predictions from Precipitation Modeling to Produce 5XXX Series Aluminum Alloy Plate with Lowered Sensitization Responses

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