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首页> 外文期刊>Materials Science and Engineering >Shape memory effect in Fe-Mn-Ni-Si-C alloys with low Mn contents
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Shape memory effect in Fe-Mn-Ni-Si-C alloys with low Mn contents

机译：低Mn含量的Fe-Mn-Ni-Si-C合金的形状记忆效应

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摘要

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 with x = 0-2, which is sufficient for an industrially applicable shape memory effect; however, it suddenly decreased in the alloys between x=2 and 3 although the significant shape recovery strain still exceeded 1%. In the alloys with x = 3 and 4, X-ray diffraction analysis and transmission electron microscope observation revealed the existence of a' martensite, which forms at the intersection of the e martensite plates and suppresses the crystallographic reversibility of the y austenite to e martensitic transformation.
机译：尝试从Fe-17Mn-6Si-0.3C（质量％）形状记忆合金开发新的基于Fe-Mn-Si的形状记忆合金，先前报道该形状记忆合金显示出优异的形状记忆效果，且成本不高通过降低其锰含量进行治疗。研究了固溶处理的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。在x = 0-2的合金中，形状恢复应变超过2％，足以实现工业上可应用的形状记忆效果；但是，尽管显着的形状恢复应变仍然超过1％，但在x = 2和3之间的合金中它突然降低。在x = 3和4的合金中，X射线衍射分析和透射电子显微镜观察表明存在a'马氏体，它在e马氏体板的相交处形成并抑制y奥氏体对e马氏体的晶体可逆性。转型。

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