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Effect of small amount of nitrogen on carbide characteristics in unidirectional Ni-base superalloy
Huang, XB; Zhang, Y; Liu, YL; Hu, ZQ
Corresponding AuthorHuang, XB()
1997-10-01
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume28Issue:10Pages:2143-2147
AbstractThe shape, size, and content of MC carbides in a unidirectional Ni-base superalloy have been studied at different solidification rates using material of normal commercial composition (5 ppm nitrogen) and two melts with additions to produce 22 and 30 ppm nitrogen. M(C,N) was found in nitrogen-doped specimens. The increased nitrogen content results in a change in carbide morphology from acicular or Chinese-script type to a blocky one. Carbide size increases from 6.85 to 7.25 mu m at 2.5 mu m/s and from 2.31 to 2.81 mu m at 200 mu m/s as the nitrogen content increases from 5 to 22 ppm; carbide size is reduced to 5.2 mu m at 2.5 mu m/s and to 2.1 mu m at 200 mu m/s when nitrogen content is further raised to 30 ppm. There is no evident change in carbide content (area percentage) with increase of nitrogen. Scanning electron microscopy (SEM) and electron probe microanalysis revealed characteristic centers in some of the blocky carbides of TiN, as nuclei of MC or M(C,N) formed in the melt. The influences of nitrogen on carbide at the low solidification rate are stronger than those at the higher rate. With the increase of solidification rate, the carbide turns from bar to Chinese-script type, except for the base alloy at 2.5 mu m/s, and the content and size decrease.
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:A1997YA65600020
PublisherMINERALS METALS MATERIALS SOC
Citation statistics
Cited Times:42[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/126809
Collection中国科学院金属研究所
Corresponding AuthorHuang, XB
AffiliationCHINESE ACAD SCI,MET RES INST,SHENYANG 110015,PEOPLES R CHINA
Recommended Citation
GB/T 7714
Huang, XB,Zhang, Y,Liu, YL,et al. Effect of small amount of nitrogen on carbide characteristics in unidirectional Ni-base superalloy[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,1997,28(10):2143-2147.
APA Huang, XB,Zhang, Y,Liu, YL,&Hu, ZQ.(1997).Effect of small amount of nitrogen on carbide characteristics in unidirectional Ni-base superalloy.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,28(10),2143-2147.
MLA Huang, XB,et al."Effect of small amount of nitrogen on carbide characteristics in unidirectional Ni-base superalloy".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 28.10(1997):2143-2147.
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