About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
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Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Cold Spray of Medium and High Entropy VCoNi, CrCoNi and CrCoFeMnNi Coatings: Effects of Topical Oxides |
Author(s) |
Desmond Edem Primus Klenam, Precious Etinosa, Trevor Bond, Arvand Navabi, Ridwan Ahmed, Mobin Vandadi, Oluwaseun Oyewole, John Obayemi, Nima Rahbar, Wole Soboyejo |
On-Site Speaker (Planned) |
Nima Rahbar |
Abstract Scope |
This paper presents the results of experimental and theoretical/computational study of cold spray behavior of medium and high entropy VCoNi, CrCoNi and CrCoFeMnNi coatings on similar substrates. A combination of single powder spray and bulk cold spray techniques is used to study the cold spray behavior of these alloys. The effects of topical nano-scale oxide layer thickness are also studied using density functional theory and finite element models. These are used to compute the contact-induced bond deformation, splat deformation, stress/strain distributions, and the crack driving forces in powders that are cold sprayed onto similar substrates at different incident velocities. The mechanical properties of the cold sprayed layers and their interfaces are then studied using nanoindentation and interfacial fracture mechanics. The underlying crack/microstructure interactions and toughening mechanisms are elucidated before exploring the implications of the current results for the design of robust, cold sprayed, complex concentrated alloys and their coatings. |
Proceedings Inclusion? |
Undecided |