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Influence of Electropulsing Treatment on the Shape Memory Effect and Precipitation of NbC in Fe-Mn-Si-Cr-Ni-Nb-C Alloy
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    Abstract:

    In order to further enhance shape memory effect (SME) and improve treatment process in Fe-based shape memory alloys, a pre-deformed Fe-Mn-Si-Cr-Ni-Nb-C alloy was subjected to a electropulsing treatment. The results show that the shape memory ratio reached the maximum 80% for the specimen subjected to a 5% pre-deformation and the electropulsing treatment at 300 V and 1 Hz for 13 times, which is 12% greater than that subjected to an ageing at 800 ℃ for 1000 s. In addition, it is found by SEM observation that the electropulsing treatment can induce a large amount of NbC precipitates with small sizes in the bulk at a short time, therefore, improve the shape memory property and increase the efficiency of shape memory effect efficiently.

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[Liu Wenbo, Li Ning, Yang Shizhou, Wen Yuhua. Influence of Electropulsing Treatment on the Shape Memory Effect and Precipitation of NbC in Fe-Mn-Si-Cr-Ni-Nb-C Alloy[J]. Rare Metal Materials and Engineering,2009,38(1):164~167.]
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  • Received:January 13,2008
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