Structural mechanism of reverse α → γ transformation and new functional properties of Fe-Ni austenitic alloys

被引：5
|
作者：
Sagaradze, V. V. [1 ]
Kabanova, I. G. [1 ]
Kataeva, N. V. [1 ]
Klyukina, M. F. [1 ]
机构：
[1] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia
来源：
EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATIONS | 2013年 / 738-739卷
关键词：
Fe-Ni austenitic alloys; cyclic martensitic transformation gamma ->epsilon; alpha; ->gamma; ordering; nanocrystalline gamma phase; strengthening; magnetic properties; Ni redistribution; thermal expansion coefficient; PHASE; IRON;
D O I：
10.4028/www.scientific.net/MSF.738-739.200
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structure of the metastable austenite Fe-32%Ni alloy quenched for martensite and subjected to the alpha ->gamma transformation at slow heating (to 593-773 K) with the formation of a nanocrystalline austenite of different orientation was investigated. Electron diffraction analysis has revealed that a nickel-enriched nanocrystalline gamma-phase acquires ordered L1(0) superstructure. Together with the gamma-phase, there was detected the disperse epsilon-martensite with a hexagonal close-packed (hcp) lattice. Along with the realization of ordinary orientation relationships (ORs) of Kurdjumov-Sachs, between a matrix alpha-phase and an ordered gamma-phase in the sample of Fe-32%Ni alloy after slow heating to 773 K there have been established Headley-Brooks ORs. Cyclic transformation promotes the improvement of many functional properties of steels (strength, coercive force, controlled thermal expansion coefficient, and others).
引用
收藏
页码：200 / 205
页数：6
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