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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
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume46AIssue:11Pages:5217-5231
AbstractThe 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
description.department[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
Funding OrganizationChinese Academy of Sciences Innovation Foundation [CXJJ-14-M44]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75139
Collection中国科学院金属研究所
Corresponding Authorycma@imr.ac.cn
Recommended Citation
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.
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