Shape memory effect in Fe―Mn―Ni―Si―C alloys with low Mn contents
Shape memory effect in Fe―Mn―Ni―Si―C alloys with low Mn contents
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DOI：
10.1016/j.msea.2011.03.059
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发表时间：
2011-06
期刊：
影响因子：
6.4
通讯作者：
X. Min;T. Sawaguchi;K. Ogawa;Maruyama Tadakatsu;F. Yin;K. Tsuzaki
中科院分区：
文献类型：
--
作者：
X. Min;T. Sawaguchi;K. Ogawa;Maruyama Tadakatsu;F. Yin;K. Tsuzaki
尝试从Fe-17 Mn-6 Si-0.3C（质量%）形状记忆合金通过降低其Mn含量来开发新的Fe-Mn-Si基形状记忆合金，该形状记忆合金先前被报道显示出上级形状记忆效果而无需任何昂贵的训练处理。研究了固溶态Fe-（17-2x）Mn-6Si-0.3C-xNi（x= 0，1，2，3，4）多晶合金的形状记忆效应和相变行为。当x = 0-2时，合金的形状恢复应变超过2%，这对于工业上可应用的形状记忆效应来说是足够的;然而，当x = 2 ~ 3时，合金的形状恢复应变突然下降，尽管显著的形状恢复应变仍然超过1%。X射线衍射分析和透射电镜观察表明，x = 3和x = 4的合金中存在α′马氏体，它形成于γ马氏体片的交叉处，抑制γ奥氏体向γ马氏体转变的晶体学可逆性。
An attempt was made to develop a new Fe–Mn–Si–based shape memory alloy from a Fe–17Mn–6Si–0.3C (mass%) shape memory alloy, which was previously reported to show a superior shape memory effect without any costly training treatment, by lowering its Mn content. The shape memory effect and the phase transformation behavior were investigated for the as-solution treated Fe–(17–2x)Mn–6Si–0.3C–xNi (x= 0, 1, 2, 3, 4) polycrystalline alloys. The shape recovery strain exceeded 2% in the alloys withx= 0–2, which is sufficient for an industrially applicable shape memory effect; however, it suddenly decreased in the alloys betweenx= 2 and 3 although the significant shape recovery strain still exceeded 1%. In the alloys withx= 3 and 4, X-ray diffraction analysis and transmission electron microscope observation revealed the existence of α′ martensite, which forms at the intersection of the ɛ martensite plates and suppresses the crystallographic reversibility of the γ austenite to ɛ martensitic transformation.