Sixth International Workshop on Stress-Assisted Corrosion Damage

June TBA, 2022
Washington, DC area, USA

About this Conference

Environmentally-assisted cracking (EAC) of engineering materials has been studied in depth for more than 50 years. The sensitivity of engineering alloys to cracking when exposed to specific environments is well known, but unanticipated failures still occur and managing structures to prevent EAC still presents significant risk and cost.  Subjects deserving of continued consideration are the mechanisms, processes, and interactions between chemical, mechanical, and metallurgical factors that account for each stage of EAC and the many manifestations of EAC that occur in service environments. Improved mechanistic understanding is fundamental to the development of EAC resistance alloys, and identification of strategies for the prediction and mitigation of EAC failures in engineering systems.     

While significant progress in our understanding of EAC has been achieved in recent years, important fundamental questions remain unanswered about the conditions and microstructural features associated with the initiation process and in many cases a transition from localized corrosion damage to small and short cracks. This workshop will focus attention on the initiation stage of EAC, an aspect of EAC that is benefitting from recent advancements in experimental methods, modeling techniques, and computational capabilities.  Contributions are solicited on all aspects of EAC initiation, including the role of localized chemistry, reaction processes, microstructure, and damage morphology, along with the significance of plasticity and dynamic environmental conditions.

The meeting objective is to congregate a group of “skilled in the field” researchers in metallurgy, facture, electrochemistry, and corrosion to participate in a workshop that will clarify our current state of knowledge, identify knowledge gaps, and detail investigative techniques to advance our understanding of EAC mechanisms.

The emphasis of this workshop will be on:

  • Theoretical and experimental studies of crack initiation that explore unifying principles and the interaction of material properties, microstructure, electrochemical processes, plasticity, and fracture
  • Mechanistic modeling of the development of corrosion damage and the nucleation and propagation of small and short cracks
  • The role of specific properties, features, conditions, and processes in initiating EAC, including time varying environmental conditions, electrochemical reactions, alloy microstructure, and plasticity under static/cyclic stress
  • New techniques for measuring crack initiation in aqueous (immersion or atmospheric) and gaseous environments, including crack tip microscopy, chemistry, and in situ crack growth and electrochemical measurements
  • Emphasis is on understanding EAC and the application of advanced measurement methods for quantifying the early stages of EAC, rather than reporting comparative performance data for material selection;
  • All topics are to be at ambient climatic temperatures, no high temperature work will be accepted
  • No abstracts on composite materials will be accepted

Scope

The symposium scope includes the fundamental understanding of EAC from the development of conditions that cause EAC, evolution of corrosion damage, and the initiation of small cracks that may propagate.  Emphasis will be on the modeling and experimental studies that provide mechanistic insight into factors and interactions that cause EAC.  Unifying principles governing the time and stress dependent crack initiation phenomena are of interest. 

Papers that are related to conventional alloy characterization without a direct link to EAC and selection testing are discouraged.

Technical Topics

  • Dependence of defect evolution and crack nucleation on alloy microstructure in aqueous electrolyte and gaseous environments.
  • Role of dynamic loading in initiating cracks from a microstructural feature and localized corrosion damage.
  • Transition from microstructural defect and corrosion damage to propagating crack under static and fatigue loads in inert and or aggressive environments.
  • Role of anodic dissolution and hydrogen on defect evolution and crack nucleation and propagation.
  • High resolution evaluation (ideally 3D) of local crack tip conditions: mechanical driving-forces, alloy microstructure, and environmental conditions.
  • Modeling of the governing EAC mechanisms – atomistic & continuum
  • The convergence of simulation and modeling with modern analytical tools, alloy development, and structural design.

Conference Organization

A.K. Vasudevan, Office of Naval Research (retired)
Ronald Latanision, Exponent, Inc.
Henry Holroyd, Luxfer (retired)
Fritz Friedersdorf, Luna Innovations Incorporated