Corrosion fatigue and stress corrosion cracking in Naval structural joints: A theoretical and experimental investigation
Abstract
The primary goal of the proposed work is to identify key parameters that relate to the underlying fundamental physics of material degradation processes in Naval structural joints under harsh environmental conditions. A sound knowledge of these mechanisms will translate into a significant improvement in providing accurate prognosis. Currently, Navy Safe-Life does not appropriately account for corrosion degradation. Rather, a 2.0-2.5 knock-down factor is typically used to account for corrosion effects [1, 2], which leads to unexpected in-service failure of structural elements. Further, a recent study on R5 steel alloys shows that combined loading affects dominate structural integrality [4]. Hence, understanding the combined environmental and mechanical loading in naval structural elements is important. In addition, how the combination initiates corrosion, in addition to improving upon predictive capability, would undoubtedly aid in improvement in availability and mission readiness. Thus, the research objectives of the proposed work are: 1) To uncover the precise crack growth driving mechanisms under complex environmental-mechanical loading on naval-relevant metals; and 2) To exploit the subsequent knowledge to develop a robust, and high fidelity predictive capability that will also improve the accuracy of structural prognosis.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 09, 2016
- Source ID
- N000141612174
Entities
People
- Kiran Solanki
Organizations
- Arizona State University
- Office of Naval Research
- United States Navy