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HIGH TEMPERATURE SHAPE MEMORY EFFECTS OF NiAI ALLOY |
CHENG Tianyi(Beijing Institute of Technology)(Manuscript received 29 December;1993; in revised form 25 March; 1994) |
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Cite this article:
CHENG Tianyi(Beijing Institute of Technology)(Manuscript received 29 December;1993; in revised form 25 March; 1994). HIGH TEMPERATURE SHAPE MEMORY EFFECTS OF NiAI ALLOY. Acta Metall Sin, 1994, 30(9): 399-403.
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Abstract One-way and two-way shape memory effects of the Ni-34.6at.-% Al thin ribbon were observed. The ribbon of one-way shape memory effect, occuired over 300℃ , has very good shape recovery(100%). A ductile γ′-Ni_3Al phase precipitated out up to 16 v.-%after high temperature annealing. Both ductility and toughness were further improved.Meanwhile, the annealed ribbon has also good one-way and two-way high temperature shape memory effects. It is believed that the Ni-riched NiAI alloy may possibly develop into a new high temperature shape memory alloy.Correspondent: CHENG Tianyi, associate professor, Beijing institute of Technology, Beijing 100081
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Received: 18 September 1994
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