期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 578, 期 -, 页码 297-302出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.06.030
关键词
NiTiHfPd alloys; Microstructure; TWSME; High work output; High strength SMAs; Shape memory alloys
资金
- NASA [NNX11AQ31A, 3049024332]
- RFBR [10-03-0154-a]
- NASA [NNX11AQ31A, 138126] Funding Source: Federal RePORTER
The load-biased shape memory and superelastic responses of a Ni45.3Ti39.7Hf10Pd5 polycrystalline alloy were investigated in compression. Transformation strain of up to 4.6% and work output of up to 29 J cm(-3) were determined from load-biased thermal cycling experiments. The alloy showed good superelastic behavior at 90 degrees C with recoverable strain of over 4%. It was also determined that the Ni45.3Ti39.7Hf10Pd5 alloy could develop two-way shape memory strain of 1.6% without an intense training process. Transmission electron microscopy (TEM) revealed that the internal twins formed in the martensite variants were < 0 1 1 > type II twins. (c) 2013 Elsevier B.V. All rights reserved.
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