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 Author | Xin, Xin(xxin@imr.ac.cn) ; Sun, Wenru(wrsun@imr.ac.cn) |
| 2022-05-01 | |
| Source Publication | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| ISSN | 2238-7854 |
| Volume | 18Pages:3094-3103 |
| Abstract | 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; |
| Keyword | Thermo-span alloy Notch sensitivity Laves Crack propagation |
| DOI | 10.1016/j.jmrt.2022.03.134 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000795544300006 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/174035 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xin, Xin; Sun, Wenru |
| Affiliation | 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 |
| 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. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment