About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Behavior at the Nanoscale VII
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Presentation Title |
Nanomechanical Effects of Composition and Microstructure in Spark Plasma Sintered Ti-Zr-Ta Alloys |
Author(s) |
Bamidele Lawrence Bayode, Thato Sharon Tshepe, Mercy Munyadziwa Ramakokovhu, Peter Apata Olubambi |
On-Site Speaker (Planned) |
Bamidele Lawrence Bayode |
Abstract Scope |
Ti-based shape memory alloys are multifunctional materials providing both actuation and structural capabilities. With potential applications in evolving miniaturized technologies within the biomedical and aerospace industries among others, the understanding of their nanomechanical behavior, rooted in their unique sub-lattice characteristics, is very crucial. This study investigates the local mechanical behavior of different microstructures in varying compositions of Ti-Zr/Ta alloys, fabricated by spark plasma sintering using an ultra-nanoindentation device. With the Oliver-Pharr method, the effects of material composition, microstructures, and varying indentation loads (5mN, 52.51 mN, and 100 mN) were considered. Results obtained revealed higher values in the modulus of ternary alloys than the binary due to larger presence of BCC structures, while twinned-α phases exhibited higher indentation energy dissipation than the untwinned counterparts. The indentation loads however displayed nonlinear nonmechanical responses in the various microstructural states, in which case this was attributed to variations in crystal orientations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Titanium, Mechanical Properties |