Precipitation and evolution of grain boundary boride in a nickel-based superalloy during thermal exposure

CORC > 金属研究所 > 中国科学院金属研究所

	Precipitation and evolution of grain boundary boride in a nickel-based superalloy during thermal exposure
	Du, Beining ; Sheng, Liyuan ; Cui, Chuanyong ; Yang, Jinxia ; Sun, Xiaofeng
刊名	MATERIALS CHARACTERIZATION
	2017-06-01
卷号	128 页码:109-114
关键词	Ni-based superalloy Boride Carbide Grain boundary Thermal exposure
ISSN号	1044-5803
通讯作者	Sheng, LY (reprint author), Peking Univ, Shenzhen Inst, Shenzhen 518057, Peoples R China. ; Cui, CY (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
中文摘要	As a grain boundary strengthening element, B is widely applied in most Ni-based superalloys. However, the added B prefer to interact with other elements near the grain boundary and form borides which would perform evolution during high temperature service, and then affect the grain boundary strength and mechanical properties of the superalloy. In the present research, a trace B doped nickel-based IN792 superalloy was fabricated and preheat treated as 1120 degrees C/2 h AC + 1080 degrees C/4 h AC (AC: air cooling) followed by thermal exposure at 750 degrees C, 845 degrees C, 900 degrees C and 950 degrees C for different times to investigate the precipitation and evolution of grain boundary M5B3 boride. The results indicate that M5B3 boride precipitates along the grain boundary at the early time of the thermal exposure of IN792 superalloy. When thermal exposed at different temperatures, the grain boundary M5B3 boride exhibits different evolution behavior. At 750 degrees C and 845 degrees C, M5B3 boride grows up gradually with the thermal exposure proceeding, and no phase transformation occurs. While at 900 degrees C and 950 degrees C, the grain boundary M5B3 boride precipitates at the early stage of the exposure process, and then transforms into M23C6 carbide as gray film with the increasing of the exposure time.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
收录类别	SCI
资助信息	Shenzhen Basic Research Project [JCYJ20160407090231002, JCYJ20150529162228734, JCYJ20150-625155931806, JCYJ20160427100211076]; Shenzhen Technology Innovation Plan [CXZZ20140731091722497, CXZZ20140419114548507]; China Postdoctoral Science Foundation [2015M580923]; Thirteen Five National Key Research and Development Plan [2016YFC1102601]
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78097]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Du, Beining,Sheng, Liyuan,Cui, Chuanyong,et al. Precipitation and evolution of grain boundary boride in a nickel-based superalloy during thermal exposure[J]. MATERIALS CHARACTERIZATION,2017,128:109-114.
APA	Du, Beining,Sheng, Liyuan,Cui, Chuanyong,Yang, Jinxia,&Sun, Xiaofeng.(2017).Precipitation and evolution of grain boundary boride in a nickel-based superalloy during thermal exposure.MATERIALS CHARACTERIZATION,128,109-114.
MLA	Du, Beining,et al."Precipitation and evolution of grain boundary boride in a nickel-based superalloy during thermal exposure".MATERIALS CHARACTERIZATION 128(2017):109-114.