Microstructural investigation on the precipitation of alpha '' nitrides and alpha ''->gamma ' nitride transformation in ion-nitrided pure iron

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	Microstructural investigation on the precipitation of alpha '' nitrides and alpha ''->gamma ' nitride transformation in ion-nitrided pure iron
	Z. Q. Liu; Y. X. Chen; Z. K. Hei; D. X. Li; H. Hashimoto
	2001
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	32 期号:11 页码:2681-2688
摘要	The precipitated characteristics of alpha " -Fe16N2 nitrides in the diffusion layer of ion-nitrided pure iron were investigated with transmission electron microscopy (TEM) and high-resolution electron microscopy (HREM). Three sets of alpha " nitrides, whose habit planes are (100)(alpha), (010)(alpha), and (001)(alpha), respectively, do not precipitate simultaneously from the diffusion layer, which is different from the normal homogeneous precipitation in Fe-N alloys. Unlike the typical disc-shaped morphology reported widely, the alpha " nitrides in the diffusion layer appear as ribbonlike slices. They grow on {001}(alpha) matrix planes with a parallel orientation relationship, and the direction of their length is parallel to the < 110 > (alpha) direction. The interface between the alpha " nitride and alpha matrix and a 7 deg [111]/(112) low-angle-tilt grain boundary in the alpha " nitride were examined with HREM. The distributions of dislocations at the interface and the grain boundary were investigated. During microstructural examination, it was observed that a gamma'-Fe4N nitride could grow on an alpha " nitride directly. The orientation relationship during the alpha " --> gamma' nitride transformation was determined as to be (001)(gamma')//(1 (1) over bar0)(alpha "),[110](gamma')//[111](alpha ").
部门归属	chinese acad sci, inst met res, atom imaging solids lab, shenyang 110016, peoples r china. dalian maritime univ, inst mat & technol, dalian 116026, peoples r china. okayama univ sci, dept mech engn, okayama 7000005, japan.;liu, zq (reprint author), chinese acad sci, inst met res, atom imaging solids lab, shenyang 110016, peoples r china
关键词	Transmission Electron-microscopy Single-crystal Films Nitrogen Martensite Magnetic-moment Thin-films Fe-n Fe16n2 Crystallography Particles Field
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WOS记录号	WOS:000172110200001
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36733
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Q. Liu,Y. X. Chen,Z. K. Hei,et al. Microstructural investigation on the precipitation of alpha '' nitrides and alpha ''->gamma ' nitride transformation in ion-nitrided pure iron[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2001,32(11):2681-2688.
APA	Z. Q. Liu,Y. X. Chen,Z. K. Hei,D. X. Li,&H. Hashimoto.(2001).Microstructural investigation on the precipitation of alpha '' nitrides and alpha ''->gamma ' nitride transformation in ion-nitrided pure iron.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,32(11),2681-2688.
MLA	Z. Q. Liu,et al."Microstructural investigation on the precipitation of alpha '' nitrides and alpha ''->gamma ' nitride transformation in ion-nitrided pure iron".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 32.11(2001):2681-2688.