|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Biological Materials Science Symposium
||Micropillar Cyclic Compression Study of a Nitinol Tube Intended for Medical Devices
||Hyunmin Kim, Hyokyung Sung, Sharvan Kumar
|On-Site Speaker (Planned)
In this study, the cyclic deformation response of a 5 mm-diameter NiTi tube with ~150 Ám wall thickness was characterized in the axial (Z), radial (R), and thickness (Ɵ) orientations by conducting displacement-controlled micropillar cyclic compression tests for 100 cycles. The microstructure of the tube was characterized by TEM of FIB lift-out specimens; x-ray diffraction was performed to characterize the texture of the tube. The austenite-to-martensite transformation stress, and the maximum stress at a fixed cyclic strain were orientation dependent. For example, the martensite transformation stress and the maximum stress at 5 % strain were the highest for the micropillars compressed in the Ɵ-direction, and the lowest in the Z-direction. For all orientations, the austenite-to-martensite transformation stress continuously decreased with increasing cycles while the maximum stress at 5 % strain increased. These results will be presented and the implications will be discussed.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)