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- W4311005231 abstract "We fabricate a nanocrystalline NiTi with an average grain size of 31 nm and high-density (4.7 × 1015 m−2) dislocations via cold rolling (38% thickness reduction) and annealing (310 ℃, 2 min) for elastocaloric cooling. It is found that the high-density-dislocation nanocrystalline NiTi shows a high yield strength of 2.09 GPa, a large and stable average temperature drop (ΔT) of 17.3 ℃ over 106 phase-transition cycles under the stress of 1.4 GPa at room temperature. The high cyclic stability originates from grain boundary and dislocation strengthening mechanisms, where the grain boundaries and the high-density dislocations suppress the nucleation of transformation-induced dislocations. The simple and effective processing route via cold rolling and low-temperature annealing is applicable to mass production of bulk nanostructured NiTi with stable elastocaloric cooling performances." @default.
- W4311005231 created "2022-12-22" @default.
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- W4311005231 date "2023-03-01" @default.
- W4311005231 modified "2023-09-30" @default.
- W4311005231 title "Grain boundary and dislocation strengthening of nanocrystalline NiTi for stable elastocaloric cooling" @default.
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- W4311005231 doi "https://doi.org/10.1016/j.scriptamat.2022.115227" @default.
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