| About this Abstract |
| Meeting |
2024 AWS Professional Program
|
| Symposium
|
2024 AWS Professional Program
|
| Presentation Title |
Cold Spray Repair of Reactor Coolant Pump Motor Shafts |
| Author(s) |
Abbas Mohammadi, James L. Yankel, Arash Parsi |
| On-Site Speaker (Planned) |
Abbas Mohammadi |
| Abstract Scope |
Cold spray is a materials deposition technique whereby metallic or metallic/ non-metallic blends of particles are accelerated in a high pressure gas stream through a Laval type nozzle above a critical threshold velocity. Upon impinging a suitable substrate, these particles undergo severe plastic deformation upon impact as they bind. Subsequent waves of particles causes consolidation and bulk deposition. Currently, Westinghouse is studying cold spray for a wide variety of applications, from corrosion protection of fuel cladding to repair of components with corrosion and wear resistant deposits, including coatings and deposits intended to protect against stress corrosion cracking in austenitic alloys, repair of carbon and alloy steel and cast iron components. In this study, some key results of Westinghouse’s research in cold spray repair and corrosion mitigation of nuclear power plant components are presented, with particular focus on repair of alloy steel reactor coolant pump motor shafts. This work shows that cold spray using nitrogen and commercially available cold spray powders such as NiCr alloy blended with chromium carbides can be effectively used to repair damaged pump motor shafts, with much higher performance than any existing thermal spray technique. |
| Proceedings Inclusion? |
Undecided |