|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Materials in Dental and Orthopedic Applications
||Tensile Mean Strain Effects on the Fatigue Behavior of Superelastic Nitinol
||Benjamin Rutherford, M.J. Mahtabi, Nima Shamsaei
|On-Site Speaker (Planned)
The effects of tensile mean strain on the fatigue behavior of superelastic Nitinol are investigated with respect to the austenite to martensite phase transformation. In many applications including biomedical, Nitinol components may be subjected to a constant load in combination with cyclic loading; thus, it is important to understand the fatigue behavior of Nitinol in presence of mean strains. Ironically as a result of the phase transformation, there may be a range of mean strains that are not detrimental to the fatigue resistance of superelastic Nitinol. In this paper, the effects of mean strain on superelastic Nitinol are investigated through a series of fatigue tests with several mean strains and strain amplitudes. In addition, an examination of the specimen microstructure to measure the ratio of martensite to austenite phase in an interrupted manner and after fracture is conducted to determine the effect of phase transformation on fatigue behavior.
||Planned: A print-only volume