About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
High Temperature Oxidation of Metals and Ceramics
|
Presentation Title |
Environmentally Assisted Cracking of Nickel and Iron Based Alloys in Te-containing Molten Salts |
Author(s) |
Mohammad Umar Farooq Khan, Miranda Mazza, Lesley D. Frame, Stephen S. Raiman |
On-Site Speaker (Planned) |
Mohammad Umar Farooq Khan |
Abstract Scope |
To understand the problem of fission product cracking, the influence of grain boundary engineering (GBE) on Te diffusion across surface grain boundaries was investigated. The work focuses on testing the GBE methodology for improving corrosion resistance in Te-containing molten salt environment. The material used in the study is a nickel-based alloy IN617, a recently ASME nuclear code-approved nickel alloy. To maximize the low coincidence site lattice (CSL) boundaries, a matrix was devised for cold working percentage and heat treatment temperature and time. Various CSL boundaries were generated by applying cold working on IN617 alloy samples to different percentages (0, 15%, 37.5%). Sample were exposed to FLiNaK salt containing Te at 800 °C for up to 100 hours. The microstructural characterization of the samples will be presented using optical microscopy and scanning electron microscopy. techniques. The influence of grain boundary characteristics on the corrosion attack and elemental ingress will be discussed. |