Structure, Microsegregation, and Precipitates of an Alloy 690 ESR Ingot in Industrial Scale

IMR OpenIR

	Structure, Microsegregation, and Precipitates of an Alloy 690 ESR Ingot in Industrial Scale
	Wang, Min; Zha, Xiangdong; Gao, Ming; Ma, Yingche; Liu, Kui; Li, Yiyi; ycma@imr.ac.cn
	2015
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN	1073-5623
卷号	46A 期号:11 页码:5217-5231
摘要	The structure, interdendritic, and intergranular segregation, and precipitates of an Alloy 690 electro-slag remelting (ESR) ingot in commercial scale (3t) were investigated by the optical microscopy, electroprobe microanalysis, scanning electron microscopy, and transmission electron microscopy (TEM) techniques. The results indicate that the central longitudinal section of the ESR ingot comprised the ramp-up, steady-state, and hot-top regions, which could be easily distinguished from each other through the macrostructures of them. In the interdendritic area, Cr and Ti were enriched, while Ni and Fe were depleted, and the nominal segregation indexes (zeta (i) = C (0) (i) /C (interdendritic) (i) ) of Ti, Cr, and Ni were 0.40, 0.91, and 1.04, respectively, in the hot-top region where suffered the severest segregation. Nitrides, principally precipitated between dendrites, were identified as TiN by TEM and EDS. The morphology, size distribution, and volume fraction of them were determined as well. In terms of the intergranular area, Cr and C coexisted, while Ni and Fe were depleted. And the dendrite-like carbides continuously distributed on the interface between grains, which were identified as M23C6 by the selected area diffraction pattern. (C) The Minerals, Metals & Materials Society and ASM International 2015
部门归属	[wang, min ; zha, xiangdong ; gao, ming ; ma, yingche ; liu, kui ; li, yiyi] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, peoples r china
资助者	Chinese Academy of Sciences Innovation Foundation [CXJJ-14-M44]
收录类别	sci
语种	英语
WOS记录号	WOS:000362344100039
引用统计	被引频次：13[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/321006/75139
专题	中国科学院金属研究所
通讯作者	ycma@imr.ac.cn
推荐引用方式 GB/T 7714	Wang, Min,Zha, Xiangdong,Gao, Ming,et al. Structure, Microsegregation, and Precipitates of an Alloy 690 ESR Ingot in Industrial Scale[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2015,46A(11):5217-5231.
APA	Wang, Min.,Zha, Xiangdong.,Gao, Ming.,Ma, Yingche.,Liu, Kui.,...&ycma@imr.ac.cn.(2015).Structure, Microsegregation, and Precipitates of an Alloy 690 ESR Ingot in Industrial Scale.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,46A(11),5217-5231.
MLA	Wang, Min,et al."Structure, Microsegregation, and Precipitates of an Alloy 690 ESR Ingot in Industrial Scale".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 46A.11(2015):5217-5231.