Effect of Nitrogen Content on the Microstructure and Mechanical Properties of K4169 Alloy

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	Effect of Nitrogen Content on the Microstructure and Mechanical Properties of K4169 Alloy
	Teng Yujun 1,2; Ou Meiqiong 1; Xing Weiwei 1; Ma Yingche 1; Liu Kui 1
刊名	RARE METAL MATERIALS AND ENGINEERING
	2019-05-01
卷号	48 期号:5 页码:1505-1516
关键词	K4169 alloy microstructure mechanical property nitride carbide
ISSN号	1002-185X
通讯作者	Ma Yingche(ycma@imr.ac.cn)
英文摘要	The influence of nitrogen content on the microstructure and mechanical properties of superalloy K4169 was investigated through Thermo-Calc calculation, DSC analysis and quenching experiments with optical microscopy (OM), scanning electronic microscopy (SEM), electron-probe micro-analyzer (EPMA) and transmission electron microscope (TEM). The results indicate that when the content of nitrogen in the alloy increases from 17 to 100 mu g/g, the precipitation temperature and the quantities of carbides and nitrides are also increased. Moreover it has been proved that the morphologies and amount of carbides can be greatly affected by the content of the nitrogen. A number of large bar-like carbides can be identified when the N content is less than 50 mu g/g and this number is decreased significantly when the content of N is increased to 70 and 100 mu g/g. With the increasing content of N, the morphologies of MC carbides are changed from bar-like to block-like. The elevated temperature performance of this alloy can be greatly affected by the N content while the room temperature performance is rarely changed. When the content of N increases from 17 to 100 mu g/g, the creep-rupture life and elongation are decreased from 300 h and 3% to 2.26 h and 2.34%, respectively. Based on this research, as an overall consideration, it is rational to control the N content below 30 mu g/g in K4169 alloy.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000470794300021
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/134075]
专题	金属研究所_中国科学院金属研究所
通讯作者	Ma Yingche
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Teng Yujun,Ou Meiqiong,Xing Weiwei,et al. Effect of Nitrogen Content on the Microstructure and Mechanical Properties of K4169 Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(5):1505-1516.
APA	Teng Yujun,Ou Meiqiong,Xing Weiwei,Ma Yingche,&Liu Kui.(2019).Effect of Nitrogen Content on the Microstructure and Mechanical Properties of K4169 Alloy.RARE METAL MATERIALS AND ENGINEERING,48(5),1505-1516.
MLA	Teng Yujun,et al."Effect of Nitrogen Content on the Microstructure and Mechanical Properties of K4169 Alloy".RARE METAL MATERIALS AND ENGINEERING 48.5(2019):1505-1516.