<p>Mechanism of notch sensitivity elimination via precipitating Laves phases at grain boundaries in a low expansion superalloy</p>

doi:10.1016/j.jmrt.2022.03.134

IMR OpenIR

	Mechanism of notch sensitivity elimination via precipitating Laves phases at grain boundaries in a low expansion superalloy
	Zhang, Weiwei 1,2; Tan, Yuanguo 3; Xin, Xin 1,2; Sun, Wenru 1,2
通讯作者	Xin, Xin(xxin@imr.ac.cn) ; Sun, Wenru(wrsun@imr.ac.cn)
	2022-05-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	18 页码:3094-3103
摘要	The effect of Laves phase on the notch sensitivity of Thermo-Span alloy has been systematically investigated in the study via scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electron backscattered diffraction (EBSD). The results show that amounts of secondary Laves phase increase and g0 phase decrease with the dissolution of primary Laves phase. The g0 phase depletion zones are formed at the vicinity of secondary Laves phases, which are the critical factor eliminating the notch sensitivity. The g0 phase depletion zones around secondary Laves phases at grain boundaries (GBs) resulted in a decrease in GBs strength along with improvement in plasticity. Therefore, GBs can accommodate high strain localization and produce Geometrically Necessary Dislocation (GND) to coordinate incompatible deformation among neighboring grains. Thus, the resistance to crack initiation and propagation at GBs is improved. Subsequently, the accumulated strain at GBs activates multiple slip systems to further coordinate deformation between GBs and intragranular regions.& nbsp;(C) The Author(s) 2022. Published by B.V.& nbsp;
关键词	Thermo-span alloy Notch sensitivity Laves Crack propagation
DOI	10.1016/j.jmrt.2022.03.134
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000795544300006
出版者	ELSEVIER
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/174035
专题	中国科学院金属研究所
通讯作者	Xin, Xin; Sun, Wenru
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Southampton, Fac Engn & Environm, Mech Engn Grp, Southampton, England
推荐引用方式 GB/T 7714	Zhang, Weiwei,Tan, Yuanguo,Xin, Xin,et al. Mechanism of notch sensitivity elimination via precipitating Laves phases at grain boundaries in a low expansion superalloy [J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2022,18:3094-3103.
APA	Zhang, Weiwei,Tan, Yuanguo,Xin, Xin,&Sun, Wenru.(2022). Mechanism of notch sensitivity elimination via precipitating Laves phases at grain boundaries in a low expansion superalloy .JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,18,3094-3103.
MLA	Zhang, Weiwei,et al." Mechanism of notch sensitivity elimination via precipitating Laves phases at grain boundaries in a low expansion superalloy ".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 18(2022):3094-3103.