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

Zhang, Weiwei1,2; Tan, Yuanguo3; Xin, Xin1,2; Sun, Wenru1,2
Corresponding AuthorXin, Xin(xxin@imr.ac.cn) ; Sun, Wenru(wrsun@imr.ac.cn)
2022-05-01
Source PublicationJOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN2238-7854
Volume18Pages:3094-3103
AbstractThe 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;
KeywordThermo-span alloy Notch sensitivity Laves Crack propagation
DOI10.1016/j.jmrt.2022.03.134
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000795544300006
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174035
Collection中国科学院金属研究所
Corresponding AuthorXin, Xin; Sun, Wenru
Affiliation1.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
Recommended Citation
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.
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