About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
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| Symposium
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Defect and Phase Transformation Pathway Engineering for Desired Microstructures
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| Presentation Title |
Pseudoelastic Response of Ion-implanted Nickel-titanium Shape Memory Alloy: Combining Experimentation and Forward Modeling |
| Author(s) |
Daniel Hong, Harshad Paranjape, Peter Anderson, Alejandro Hinojos, Michael Mills, Khalid Hattar, Nan Li, Jeremy Schaffer |
| On-Site Speaker (Planned) |
Daniel Hong |
| Abstract Scope |
This work reports on an experimental-simulation approach to determine the effect of Ni-ion implantation on the pseudoelastic-plastic response of Ni-rich NiTi shape memory alloys. A key aim is to achieve a strain glass response by manipulating nucleation and pinning sites for phase transformation. Near-surface regions of ion-implanted material are investigated using nanoindentation and electron microscopy and coupled with finite element simulations of nanoindentation. The approach provides a means to quantify the effects of ion implantation on the stress-induced phase transformation and crystal plasticity in the austenite phase. Initial results show that ion-implantation can more than double hardness while increasing the percent of recoverable displacement during indentation. The results suggest the potential for ion-implantation to improve wear and fatigue resistance of Ni-Ti shape memory alloys.
This work is supported by the Department of Energy, Basic Energy Sciences (DE-SC0001258), Center for Integrated Nanotechnologies (2019BC0126), and Ohio Supercomputing Center (PAS0676). |
| Proceedings Inclusion? |
Planned: |