59979
Effect of solution heat treatment of nitinol (Ni55%-Ti45%) manufactured via L-PBF

Friday, May 10, 2024: 9:45 AM
Meeting Room I (Hotel Cascais Miragem)
Ms. Neha Agarwal , Dublin City University, Dublin, Dublin, Ireland, I Form Advanced Manufacturing Research Centre, Dublin, Dublin, Ireland, Advanced Processing Technology Research Centre, Dublin, Dublin, Ireland
Mr. Karim Asal , University of Brescia, Brescia, Brescia BS, Italy
Mr. Andrea Faraoni , University of Brescia, Brescia, Brescia BS, Italy
Prof. Annalisa Pola , University of Brescia, Brescia, Brescia BS, Italy
Dr. Muhannad Ahmed Obedi , Advanced Processing Technology Research Centre, Dublin, Dublin, Ireland, I Form Advanced Manufacturing Research Centre, Dublin, Dublin, Ireland, Dublin City University, Dublin, Dublin, Ireland
Prof. Dermot Brabazon , Advanced Processing Technology Research Centre, Dublin, Dublin, Ireland, I Form Advanced Manufacturing Research Centre, Dublin, Dublin, Ireland, Dublin City University, Dublin, Dublin, Ireland
Biomedical industry has seen recent advances with the utilisation of additive manufacturing technique to fulfil its requirements. Superelastic nitinol has found its application in various implants specially as stents. Although net shape of complex structures is possible with laser powder bed fusion (L-PBF) technique, post processing helps in altering the properties of the fabricated parts. Heat treatment is a process that is used to alter the physical and mechanical properties of the part by heating and cooling them. This study has examined the effect of solution heat treatment parameters of varying times and temperatures on the properties of nitinol cuboids fabricated using laser powder bed fusion (L-PBF). Various functional properties such as relative density, microhardness, phase transformation temperatures and resulting elemental composition will be evaluated. Microstructure morphology analysis will be investigated via Scanning Electron Microscopy and Optical Microscopy. Crystallographic and elemental characterisation was examined with X-Ray Diffraction and Electron Dispersive X-Ray techniques.

Keywords: Nitinol; superelastic; phase transformation; L-PBF; Solution heat treatment

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