Shape memory functionality under multi-cycles in NiTiHf

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• 作者：H. Sehitoglu^a ; ^{huseyin@illinois.edu} ; Y. Wu^a ; L. Patriarca^a ; ^b
• 关键词：Functional fatigue ; NiTiHf ; Shape memory effect ; High temperature shape memory alloy
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：129
• 期：Complete
• 页码：11-15
• 全文大小：673 K
• 卷排序：129

文摘

The functionality of NiTiHf (25%Hf) shape memory alloy (SMA) was studied under isobaric temperature cycling experiments. Both the local and overall strains, determined with digital image correlation (DIC), displayed excellent stability and no measurable unrecovered elongation. The external stress levels were higher than 250 MPa and transformation temperature was 420 °C which exceeds other NiTi based alloys, demonstrating the outstanding potential of the NiTiHf alloys.