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- W4310859770 endingPage "168310" @default.
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- W4310859770 abstract "Solid-state cooling based on elastocaloric effect possesses potential for refrigeration. The improvement of elastocaloric effect and thermal cycle stability is beneficial to enhance the refrigeration efficiency and service life of refrigeration equipment. Here, single-crystal Ni50Mn31.6Ti18.4 shape-memory alloys were successfully prepared using directional solidification technique. The microstructure, martensitic transformation, isothermal stress-strain responses and elastocaloric effect of the single crystals with different solidification rates have been systematically studied. The single crystal solidified at 10 µm s−1 exhibits lower stress hysteresis Δσhy and much more superior adiabatic temperature |ΔTad| than those of alloys solidified at 100 µm s−1 and 500 µm s−1, with the values of 34 MPa and 24.8 K. In addition, the single crystal at low solidification rate also performs excellent cyclic stability. All these results show that the single crystal with larger austenite primary dendrite arm spacing (PDAS) can effectively enhance the elastocaloric effect and thermal cycling stability in Ni50Mn31.6Ti18.4 alloys. This work sheds a bright light on the relationship between the elastocaloric performance and microstructure for shape-memory alloys." @default.
- W4310859770 created "2022-12-19" @default.
- W4310859770 creator A5033737213 @default.
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- W4310859770 date "2023-03-01" @default.
- W4310859770 modified "2023-09-26" @default.
- W4310859770 title "Enhancing the elastocaloric effect and thermal cycling stability in dendritic-like Ni50Mn31.6Ti18.4 single crystal" @default.
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- W4310859770 doi "https://doi.org/10.1016/j.jallcom.2022.168310" @default.
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