|About this Abstract
||Materials Science & Technology 2019
||Ultra High Performance Metallic Systems for Aerospace, Defense, and Automotive Applications
||Effects of Pd Addition to High Strength NiTiHf Shape Memory Alloys
||Guher Pelin Pelin Toker, Soheil Saedi , Dipak Banerjee, Haluk Karaca
|On-Site Speaker (Planned)
Binary NiTi alloys have already gained immense popularity in the biomedical industry. However, they possess adequate limitations i.e. low strength and transformation temperature that has constrained their implementation in many other potential applications. Addition of ternary Hf element has been proven to be very effective to improve the strength and increase the transformation temperatures of the conventional NiTi. However, high strength NiTiHf alloys suffer from high brittleness and low transformation strain. Our studies show that the addition of even minor (3-5 %at) Pd content could overcome these drawbacks. In current study, two different compositions Ni47.3Ti29.7Hf20Pd3 and Ni43.3Ti31.7Hf20Pd5 (% at) were investigated. Following a systematic aging study, transformation temperature, microstructure, and shape memory response of the alloys were characterized. Both alloys were found to show a desirable combination of high transformation temperatures, strain recovery, strength, and ductility.
||Definite: At-meeting proceedings