| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Influence of Laser Machining on the Nanomechanical Behavior of Nickel Titanium Shape Memory Alloy |
| Author(s) |
Albert C. Lin, Kevin Schmalbach, Kaci Gwilt, Julia Hoffmann, Dhiraj Catoor, Markus Reiterer, Nathan Mara |
| On-Site Speaker (Planned) |
Albert C. Lin |
| Abstract Scope |
Nickel-titanium shape-memory alloys (nitinol) are widely used in the biomedical field for their ability to fully recover large strains of up to 8%, along with their high strength, corrosion resistance, and biocompatibility. Manufacturing techniques such as laser machining are used to process this material, which can affect the underlying material properties. In this investigation, the compositional and microstructural effects of laser machining on the nanomechanical properties of nitinol are explored. Ex situ nanoindentation in combination with electron microscopy reveals gradients in local microstructure and mechanical properties between the bulk material and the heat affected zone arising from laser processing. The heat affected zone exhibits a ~40% decrease in nanohardness and decreased pile-up compared to the base material. These outcomes will be discussed with respect to their implications on microstructure-mechanical behavior correlations, indentation size effect, and pseudoelastic/shape memory behavior. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |