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Two main challenges in the design of reliable shape memory alloys for medical devices are improving fatigue life and addressing biocompatibility issues such as Ni hypersensitivity. This study presents the optimized design of a low-Ni (Pd,Ni)50(Ti,Al)50 alloy and the characterization of a peak-strengthened Ni-free (Pd,Fe)50(Ti,Al)50 superelastic alloy. Precipitate size, phase fraction, and phase composition...
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