Stress corrosion cracking mechanism of cold spray coating on a galvanically similar substrate
Journal Article
·
· Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
- Purdue Univ., West Lafayette, IN (United States)
- The Ohio State Univ., Columbus, OH (United States)
- Florida State Univ., Tallahassee, FL (United States).FAMU-FSU College of Engineering; Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- VRC Metal Systems, Box Elder, SD (United States)
Here, the chloride-induced stress corrosion cracking (CISCC) mechanism of cold spray (CS) coating on a galvanically similar substrate is investigated. Arc welded 304L stainless steel (SS) specimens are loaded into four-point bend fixtures, cold sprayed with 304L SS, then immersed in boiling MgCl2. Interconnected porosity forms through crevice corrosion along CS splat boundaries, allowing corrosive species to penetrate through the CS layer. Nevertheless, the substrate is resistant to CISCC likely because of compressive stress introduced by peening during CS particle impacts. These findings underscore the importance of residual stress in the environmental degradation of CS coatings or repairs of engineering structures.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Nuclear Energy (NE)
- Grant/Contract Number:
- NA0003525; NE0008759
- OSTI ID:
- 1877113
- Alternate ID(s):
- OSTI ID: 1874739
- Report Number(s):
- SAND2022-7947J; 707259
- Journal Information:
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Journal Name: Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing Vol. 849; ISSN 0921-5093
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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