Effect of Zr addition on precipitates in K4169 superalloy

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	Effect of Zr addition on precipitates in K4169 superalloy
	Li Yamin; Liu Hongjun; Liu Jie; Wang Zhipeng; Hao Yuan
刊名	CHINA FOUNDRY
	2012-02
卷号	9 期号:1 页码:6-10
关键词	K4169 superalloy precipitation Zr long time aging heat treatment
ISSN号	1672-6421
英文摘要	In order to investigate the effect of Zr addition on the precipitations of K4169 superalloy, a manual electric arc furnace was used to prepare the superalloy with different Zr addition from 0.03wt.% to 0.07wt%. After standard heat treatment and long-time aging, the microstructures of the alloys were observed using XRD, SEM and TEM. The results show that Zr not only inhibits the precipitation of Laves phase at the grain boundary, but also significantly promotes the precipitation of earlobe-like gamma' and gamma '' phases. After long time aging at 680 degrees C for 500 h, the gamma '' phase grows up obviously and forms a gamma'/gamma '' clad microstructure when the Zr addition is 0.03 wt.%. A large number of fine orbed gamma' particles precipitate in the grains and some gamma '' phase transforms to disk-like delta phase when the Zr addition increases to 0.05wt.%. The nano-polycrystalline gamma' phase precipitates in the grains and there is a little d phase when the Zr addition is 0.07wt.%. As the Zr addition increases, the amount of Laves phase at the grain boundary decreases at first, and then increases and forms flaky morphology.
资助项目	Natural Science Foundation of Gansu Province, China[3ZS042-B25-028]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	FOUNDRY JOURNAL AGENCY
WOS记录号	WOS:000301459800002
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34947]
专题	国际教育学院材料科学与工程学院电气工程与信息工程学院
通讯作者	Li Yamin
作者单位	Lanzhou Univ Technol, Minist Educ, Key Lab Nonferrous Met Alloys & Proc, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Li Yamin,Liu Hongjun,Liu Jie,et al. Effect of Zr addition on precipitates in K4169 superalloy[J]. CHINA FOUNDRY,2012,9(1):6-10.
APA	Li Yamin,Liu Hongjun,Liu Jie,Wang Zhipeng,&Hao Yuan.(2012).Effect of Zr addition on precipitates in K4169 superalloy.CHINA FOUNDRY,9(1),6-10.
MLA	Li Yamin,et al."Effect of Zr addition on precipitates in K4169 superalloy".CHINA FOUNDRY 9.1(2012):6-10.