| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Society for Biomaterials: Student Poster Contest + Rapid Fire
|
| Presentation Title |
C-14: Characterization of the Microstructure, Microhardness and Electrochemical Corrosion Behavior of a NbTiCr Multicomponent Alloy: A First Step Toward an Orthopedic-implant Application |
| Author(s) |
Isabela Dainezi, Joćo Gabriel da Cruz Passos, Carlos Alberto Della Rovere |
| On-Site Speaker (Planned) |
Isabela Dainezi |
| Abstract Scope |
Bearing in mind the innovative multicomponent alloy (MCA) concept and the properties required for an orthopedic-implant application, we elaborated a NbTiCr MCA and studied it in the as-cast and hot isostatically pressed conditions. The microstructures, hardness properties, and electrochemical polarization behavior in physiological saline solution (0.9%wt NaCl) were characterized in depth. Our main findings indicated that in both processing conditions the NbTiCr MCA consisted of two phases, namely: a Ti-rich body-centered cubic structure (disordered BCC, A2) matrix with Cr-rich ordered face-centered cubic structure (Laves, C15) precipitates. The NbTiCr MCA presented excellent mechanical strength and microhardness values around 579 HV were obtained for the as-cast condition. Also, in both processing conditions, the NbTiCr MCA exhibited a pitting corrosion resistance superior to that of CoCrMo alloy in 0.9%wt NaCl solution. These preliminary results can be taken as an opportunity to develop new orthopedic-implant alloys based on the NbTiCr MCA composition. |