|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Evolution of Martensitic Transformation Behavior in Cu-Zr-Ni Shape Memory Alloy Thin Films Evaluated Using Combinatorial Nanocalorimetry
||Yucong Miao, Anjana Talapatra, Ruben Villareal, Raymundo Arroyave, Joost Vlassak
|On-Site Speaker (Planned)
Cu-Zr-Ni alloys are being investigated for use as shape memory alloys with high-temperature applications. The addition of Ni raises the martensite transformation temperature, but little is known about its effects on microstructure or thermal fatigue of the alloys. We have investigated the martensitic transformation in thin films of Cu-Zr-Ni using combinatorial nanocalorimetry. Cu-Zr-Ni coatings of various compositions were magnetron sputtered onto micro-machined calorimetry sensors, and the transformation temperatures and enthalpies were mapped as a function of sample composition and heat treatment. The microstructures of select samples were analyzed using XRD and cross-sectional TEM. We will present the effects of composition, heat treatment, and grain size on the transformation temperature, hysteresis, and functional stability of the samples. The transformation behavior of these alloys will be discussed in light of ab initio simulations of the materials system.
||Planned: Supplemental Proceedings volume