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電脈沖處理對(duì)FeMnSiCrNiNbC合金NbC析出及記憶效應(yīng)的影響
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國(guó)家自然科學(xué)基金（50501015）


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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    摘要:

    研究了電脈沖處理對(duì)FeMnSiCrNiNbC合金形狀記憶效應(yīng)的影響，并對(duì)其微觀機(jī)理進(jìn)行初步探討。結(jié)果表明，F(xiàn)e17Mn5Si8Cr5Ni0.5NbC合金經(jīng)5%預(yù)變形，300 V，1 Hz電脈沖處理13次后形狀回復(fù)率達(dá)到80%，比800 ℃時(shí)效1000 s獲得的最大值提高12%。SEM分析表明，電脈沖處理可在極短的時(shí)間內(nèi)加速誘導(dǎo)大量、細(xì)小的NbC顆粒在基體內(nèi)析出，進(jìn)而有效地改善了合金的記憶性能并提高了效率。

    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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劉文博,李 寧,楊世洲,文玉華.電脈沖處理對(duì)FeMnSiCrNiNbC合金NbC析出及記憶效應(yīng)的影響[J].稀有金屬材料與工程,2009,38(1):164~167.[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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  • 收稿日期:2008-01-13
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