High temperature shapememory behavior of Ni50.3Ti25Hf24.7 single crystals
نویسندگان
چکیده
Article history: Received 11 December 2015 Received in revised form 9 January 2016 Accepted 9 January 2016 Available online 25 January 2016 In thisworkwe present the high temperature functional behavior of the newNi50.3Ti25Hf24.7 shapememory alloy (SMA). Very high transformation strainsweremeasured during isobaric experiments at temperatures up to Af= 420 °C. For the [111]B2 orientation in tension, wemeasured with digital image correlation (DIC) averaged transformation strain of 5.15%, while in small domains 7.74%. For the [011]B2 orientation in compression,wemeasured averaged transformation strain of 4.6%, locally 5.3%. The remarkable results in terms of actuation strains at T N 400 °C define the Ni50.3Ti25Hf24.7 alloy as one of the most promising shape SMA for high temperature applications. © 2016 Elsevier Ltd. All rights reserved.
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