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We report on unprecedented transformation strains exceeding 20% in tension for Ni50.5Ti36.2Hf13.3 shape memory alloy (SMA). The strain measurements were made at multiscales utilizing advanced digital image correlation. The display of excellent strain reversibility in shape memory (isothermal deformation between Mf and Af), isobaric thermal cycling (between Mf and Af), and superelasticity experiments...
In this work we present the high temperature functional behavior of the new Ni50.3Ti25Hf24.7 shape memory alloy (SMA). Very high transformation strains were measured during isobaric experiments at temperatures up to Af=420°C. For the [111]B2 orientation in tension, we measured with digital image correlation (DIC) averaged transformation strain of 5.15%, while in small domains 7.74%. For the [011]B2...
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