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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Environmentally Assisted Cracking: Theory and Practice
Presentation Title Effect of 3D Crystallographic Orientation and Microstructure on the Evolution of Corrosion in Aluminum Alloys
Author(s) Tyler Stannard, Hrishikesh Bale, Nicolas Gueninchault, Jeff Gelb, Arno Merkle, Erik Lauridsen, Nikhilesh Chawla
On-Site Speaker (Planned) Nikhilesh Chawla
Abstract Scope Aluminum alloys are frequently exposed to harsh environments in service. Several factors including the underlying microstructure, defects, and crystallographic orientations effect corrosion-related fracture of these alloys. Grain mapping techniques like EBSD are restricted to 2D surface imaging and can only be extended in three dimensions by serial sectioning of the sample. Laboratory-based diffraction contrast tomography is now possible on a commercially available X-ray microscope enabling a time dependent study of corrosion in aluminium alloys wherein samples can be imaged in 3D to understand the complex mechanisms of corrosion. We present results of LabDCT applied to peak-aged 7475 alloy which reveal the 3D microstructure. Absorption tomography data clearly shows the distribution of inclusions throughout the sample volume along with LabDCT results showing corresponding grain information. We also present the results of combining the two datasets, which enables quantification of the influences of grain orientation and inclusions on corrosion pit formation.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3D Microstructural and Electrochemical Characterization of Accelerated Corrosion in Aluminum Alloys
Characterization of Stress Corrosion Cracking of 304 Stainless Steel Using High-energy Synchrotron X-ray Microtomography
Comparative Assessment of the Fracture Behaviour of API 5L X65 and Micro-alloyed Steels in E80 Simulated Fuel Ethanol Environment
Comparison of Hydrogen Introduction Techniques for In-situ TEM Straining Experiments
Correlative 3D Imaging of Iodine-induced Stress Corrosion Cracks in Zr Alloys
Corrosion Crack Propagation Modeling Using Meshless Peridynamics Approach
Cracking Behavior and Fracture Toughness of Irradiated Austenitic Stainless Steels in LWR Environments
Dealloying Induced Stress Corrosion Cracking
Dispelling Myths about Gaseous Hydrogen Environmental Fracture and Fatigue
EAC Behavior of Modified Duplex Stainless Steel Bars in Seawater
Effect of 3D Crystallographic Orientation and Microstructure on the Evolution of Corrosion in Aluminum Alloys
Effect of Frequency on Corrosion Fatigue Behavior of Steel 1.4016 in E85 Biofuel up to the Very High Cycle Fatigue Regime
Effect of Hydrogen on Ideal Shear Strength of Metals: An Ab-initio Study
Effect of Mechanical Deformation on the Corrosion Behavior in Al 7075 – Ti6Al4V Galvanic Joint
Effect of Titanium Contents on Hydrogen Induced Cracking Susceptibility and Hydrogen Permeation Characteristic of X80 Pipeline Steel
Electrochemical-mechanical Interactions in an Aluminum Alloy under Slow Strain Rate Stress Corrosion Cracking
Environment Induced Degradation in Maraging Steel Grade 18Ni1750
Environmental Cracking: Theory Depends on Practice
Evaluating the Effect of Sensitizing Time on the Hydrogen Embrittlement of Austenitic Stainless Steels
From First Discoveries in the Late 1800s to Mechanistic Understanding and Radiation Effects in the Early 2000s: Over 140 Years of Stress Corrosion Cracking Research
Fundamental Mechanisms of Preventing Stress Corrosion Cracking of Austenitic Alloys by Laser Shock Peening
Hydrogen-dislocation Interaction Revisited by Quantitative Mechanical Tests inside TEM
Hydrogen and Dislocation Assisted Grain Boundary Crack Initiation Mechanism
IASCC Behavior of Additively Manufactured 316L Stainless Steel in Light Water Reactor Environments
Incorporating Detailed Experimental Grain Boundary β-phase (Mg2Al3) Observations to Improve Sensitization Modeling of Aluminum AA5XXX Alloys
Influence of MC Carbides and γ’ on Hydrogen Trapping in Nickel Alloys and Superalloys: Experiment and Alloy Design
Mechanisms of High Temperature Stress Corrosion Crack Initiation in Austenitic Alloys
Metallurgical Factors and Changes Driving Susceptibly to Environment Assisted Cracking in Aluminum Alloys
Phase Field Modeling of Pitting & Crevice Corrosion
Role of Nitrogen on Hydride Nucleation and Stability in Pure Niobium by First-principles Calculations
SCC Property Evolution of X70 Pipeline Steel in Simulated Deep-sea Environments
Sensitization Effects on Tensile Behavior in 5XXX Series Aluminum Alloys: Environmentally Enhanced Cracking
The Effects of Grain Boundary Structure on the Intergranular Stress Corrosion Cracking Initiation Susceptibility of Alloy 690 in High Temperature Water
The Stress Corrosion Cracking Mechanism of a Cu-free Al-Zn-Mg Alloy in Sodium Chloride Solutions
Trapping against Hydrogen Embrittlement

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