About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering IV
|
Presentation Title |
Mapping the Nanomechanical Behavior of Refractory Alloy Nitride Coatings |
Author(s) |
Andre Bohn, Yu-Hsuan Lin, Justin Y Cheng, David Poerschke, Nathan A Mara |
On-Site Speaker (Planned) |
Andre Bohn |
Abstract Scope |
Nitride-based surface enhancement plays an important role in achieving desired tribological characteristics in many wear applications. While this technique is readily applied to various ferrous alloys, improved understanding of processing-microstructure-property relationships for nitridation of other principal components is necessary to develop comparable processes for emerging transition and refractory metal multi-principal element alloys. To provide the science base underpinning process design for these new alloys, we gas nitrided pure Ta, Hf, Mo, Zr, Ti, and Nb under varying nitrogen potentials and temperatures to probe the transitions between nitrogen dissolution into the alloy and nitride compound layer formation. We used Berkovich nanoindentation to map hardness and modulus as a function of local composition of nitrided regions before and after processing. These insights about the effect of processing on the thickness of the reacted and interdiffused regions can guide tuning of mechanical properties by manipulating surface nitride formation and subsurface nitrogen concentration. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, Characterization, Mechanical Properties |