Microstructures responsible for the invar and permalloy effects in Fe-Ni alloys
Microstructures responsible for the invar and permalloy effects in Fe-Ni alloys
复制标题
铁镍合金中因瓦合金和坡莫合金效应的微观结构
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
N. V. Lomova
中科院分区：
文献类型：
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作者：
Yu. I. Ustinovshchikov;I. Shabanova;N. V. Lomova
通过透射电子显微镜和X射线电子能谱对Fe68Ni32和Fe23Ni77合金进行的实验研究表明，这些合金在600℃附近发生有序分离相变。在高于转变温度的温度下，合金的有序能为正，并且结构包含富含其中一种成分的簇。在 Fe68Ni32 合金中殷钢效应最大的温度下进行热处理后，形成调制的微观结构。低于转变温度，有序能为负，这提供了形成化合物的趋势。在这些温度下时效后（Fe23Ni77 合金表现出高坡莫合金性能），高度分散、完全连贯的具有 L12 结构的 FeNi3 相颗粒在固溶体中沉淀。
The experimental studies of Fe68Ni32 and Fe23Ni77 alloys by transmission electron microscopy and X-ray electron spectroscopy show that the ordering-separation phase transition in these alloys occurs in a temperature range near 600°C. At temperatures higher than the transition temperature, the ordering energy of the alloy is positive, and the structures contain clusters enriched in one of the components. After heat treatment at the temperatures where the invar effect in the Fe68Ni32 alloy is maximal, a modulated microstructure forms. Below the transition temperature, the ordering energy is negative, which provides a tendency to formation of chemical compounds. After aging at these temperatures (where the Fe23Ni77 alloy exhibits high permalloy properties), highly dispersed completely coherent particles of the FeNi3 phase with structure L12 precipitate in a solid solution.