Effect of small amount of nitrogen on carbide characteristics in unidirectional Ni-base superalloy

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of small amount of nitrogen on carbide characteristics in unidirectional Ni-base superalloy
	Huang, XB; Zhang, Y; Liu, YL; Hu, ZQ
刊名	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
	1997-10-01
卷号	28 期号:10 页码:2143-2147
ISSN号	1073-5623
通讯作者	Huang, XB()
英文摘要	The 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.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MINERALS METALS MATERIALS SOC
WOS记录号	WOS:A1997YA65600020
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/126808]
专题	金属研究所_中国科学院金属研究所
通讯作者	Huang, XB
作者单位	CHINESE ACAD SCI,MET RES INST,SHENYANG 110015,PEOPLES R CHINA
推荐引用方式 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.