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
	2012-02
发表期刊	CHINA FOUNDRY
ISSN	1672-6421
卷号	9 期号:1 页码:6-10
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.
关键词	K4169 superalloy precipitation Zr long time aging heat treatment
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Gansu Province, China[3ZS042-B25-028]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000301459800002
出版者	FOUNDRY JOURNAL AGENCY
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/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
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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.