Deformation-induced cyclic phase transitions of dissolution-precipitation of nitrides in surface layers of Fe-Cr-(Ni)-N alloys

被引：8

作者：

Shabashov, V. A. ^{[1
]}

Borisov, S. V. ^{[2
]}

Litvinov, A. V. ^{[1
]}

Sagaradze, V. V. ^{[1
]}

Zamatovskii, A. E. ^{[1
]}

Lyashkov, K. A. ^{[1
]}

Vil'danova, N. F. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia

[2] Russian Acad Sci, Inst Solid State Chem, Ural Branch, Ekaterinburg 620990, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2012年 / 113卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

Fe-Cr-(Ni)-N; ion-plasma nitriding; mechanical alloying; nanostructurization; surface; Mossbauer spectroscopy; TRANSFORMATIONS; STEELS;

D O I：

10.1134/S0031918X12050079

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Methods of Mossbauer spectroscopy, transmission electron microscopy, and X-ray diffraction have been used to study structural and phase transformations in surface layers of iron and Fe-Cr-(Ni) alloys subjected to ion-plasma nitriding and subsequent severe cold plastic deformation by shear under pressure in Bridgman anvils. It has been shown that the cyclic phase transformations of dissolution-precipitation of nitrides in the alloys result in the formation of nitrogen-supersaturated solid solutions, precipitation of secondary nitrides, and the nanostructurization of the metallic matrix. It has been established that the introduction of chromium into iron alloys accelerates the formation of nitrides upon nitriding and makes it possible to obtain solid solutions strongly supersaturated with nitrogen (more than 10 at % N in the fcc lattice) during subsequent deformation.

引用

页码：489 / 503

页数：15

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