|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||M-26: Combined Experimental and DFT Computational Study of NiTiZrCu High Temperature Shape Memory Alloy
||Tapasendra Adhikary, Bharat Charan Goud Marupalli, Gourab Bhattacharya, Akash Oraon, Banty Kumar, Shampa Aich
|On-Site Speaker (Planned)
The effect of Zr and Cu additions on the phase stability, microstructure and martensitic transformation temperature of binary NiTi alloys has been investigated with a combined approach of experimental measurements and first principle density functional theory calculations. In this work, multilayer Ni/Ti/Zr/Cu films have been deposited using the magnetron sputtering on Si substrates at room temperature and subsequently annealed at 350 C for complete inter-diffusion of multilayers to create amorphous phase followed by high temperature annealing at 600 C for 5 min to achieve Ni44Ti35Zr15Cu6 shape memory alloys. The high temperature annealing is required for the formation of crystalline phases. The formation energy results indicate that the Zr and Cu additions to NiTi favor the formation of monoclinic B19' phase. The differential scanning calorimetry results show that the martensitic transformation temperature increases with Zr and Cu additions.
||Characterization, Computational Materials Science & Engineering, Modeling and Simulation