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Meeting Materials Science & Technology 2020
Symposium Environmentally Assisted Cracking: Theory and Practice
Presentation Title Assessing the Influence of Hydrogen on The Deformation Behavior of a Precipitation-hardened Nickel-based Alloy
Author(s) Zachary D. Harris, Jishnu Bhattacharyya, Joseph Ronevich, Sean Agnew, James Burns
On-Site Speaker (Planned) Zachary D. Harris
Abstract Scope This study examines the effect of hydrogen (H) on the deformation behavior of Monel K-500 in various isothermal heat treatment conditions via uniaxial mechanical testing and transmission electron microscopy (TEM). In particular, H was found to modify work hardening metrics related to the dislocation storage and recovery rates. Specifically, the H-charged peak-aged specimen exhibited a significant increase in initial hardening (dislocation storage) rate relative to the H-charged under-aged specimen. Moreover, H was found to tangibly increase dislocation recovery rates for all heat treatment conditions, with the exception of the over-aged alloy. TEM of the non-charged and H-charged peak-aged specimens revealed the onset of widespread dislocation looping in the H-charged sample, while only planar slip bands were observed in the non-charged condition. Possible mechanisms to explain the observed effects of H are proposed and the applicability of these mechanistic insights to single-phase model alloys are then discussed.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Analyzing High-angle Grain Boundary Network Connectivity Using Graph Theory
Assessing the Influence of Hydrogen on The Deformation Behavior of a Precipitation-hardened Nickel-based Alloy
Atomistic Simulations of the Transport and Trapping of Hydrogen in Zirconium
Corrosion Fatigue Testing of AA7085-T7451 in Complex Atmospheric Environments of Varied Humidity with Surface Salt Loading
Cracking Mechanism of Carbon Steel in Presence of H2S/CO2 and H2S Scavenger, a Theory Based on Electrochemistry, Raman, and Tensile Testing
Directional Sensitization Responses in 5XXX Series Aluminum Alloy Microstructures
Elucidating the Loading Rate Dependence of Hydrogen Environment-assisted Cracking Behavior in Ti, Fe, Al, and Ni-based Structural Alloys
Hydrostatic Instability as the Underlying Mechanism of Hydrogen Embrittlement
Introductory Comments: Environmentally Assisted Cracking: Theory and Practice
Microstructure and Beta Phase Distribution Effects on Environmental Fracture Susceptibility in Al-Mg Alloys
Pit-to-Crack Transition in Stress Corrosion Cracking of Type 304 Stainless Steels Under Marine Exposure Conditions
The Relationship between Post-build Stress-relief Heat Treatment and the Hydrogen Embrittlement Susceptibility of Additively Manufactured IN625
The Role of SCC in Corrosion Fatigue Kinetics of AA5456-H116
Understanding Pitting Corrosion in a High-performance Aluminum Alloy by 4D X-ray Microtomography

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