Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/94241
DC Field | Value | Language |
---|---|---|
dc.contributor | Department of Mechanical Engineering | en_US |
dc.creator | Cao, BX | en_US |
dc.creator | Kong, HJ | en_US |
dc.creator | Fan, L | en_US |
dc.creator | Luan, JH | en_US |
dc.creator | Jiao, ZB | en_US |
dc.creator | Kai, JJ | en_US |
dc.creator | Yang, T | en_US |
dc.creator | Liu, CT | en_US |
dc.date.accessioned | 2022-08-11T01:09:34Z | - |
dc.date.available | 2022-08-11T01:09:34Z | - |
dc.identifier.issn | 1359-6462 | en_US |
dc.identifier.uri | http://hdl.handle.net/10397/94241 | - |
dc.language.iso | en | en_US |
dc.publisher | Pergamon Press | en_US |
dc.rights | © 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. | en_US |
dc.rights | © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. | en_US |
dc.rights | The following publication Cao, B. X., et al. (2021). "Heterogenous columnar-grained high-entropy alloys produce exceptional resistance to intermediate-temperature intergranular embrittlement." Scripta Materialia 194: 113622 is available at https://dx.doi.org/10.1016/j.scriptamat.2020.11.007. | en_US |
dc.subject | Grain boundary embrittlement | en_US |
dc.subject | Grain boundary structure | en_US |
dc.subject | High-entropy alloy | en_US |
dc.subject | Precipitation strengthening | en_US |
dc.title | Heterogenous columnar-grained high-entropy alloys produce exceptional resistance to intermediate-temperature intergranular embrittlement | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.volume | 194 | en_US |
dc.identifier.doi | 10.1016/j.scriptamat.2020.11.007 | en_US |
dcterms.abstract | High-entropy alloys (HEAs) strengthened by coherent nanoparticles show great potentials for elevated-temperature structural applications, which however, generally suffer from a severe intergranular embrittlement when tested at intermediate temperatures. In this study, we demonstrated a novel “heterogenous columnar-grained” (HCG) approach that can effectively overcome this thorny problem. Different from the equiaxed counterpart which shows extreme brittleness along grain boundaries at 800 °C, the newly developed HCG-HEA exhibits an exceptionally high resistance to intergranular fractures originating from the unique grain-boundary characters and distributions. The presence of heterogenous columnar grain structure drastically suppresses the crack nucleation and propagation along with boundaries, resulting in an unusually large tensile ductility of ~18.4 % combined with a high yield strength of ~652 MPa at 800 °C. This finding provides a new insight into the innovative design of high-temperature materials with extraordinary mechanical properties. | en_US |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Scripta materialia, 15 Mar. 2021, v. 194, 113622 | en_US |
dcterms.isPartOf | Scripta materialia | en_US |
dcterms.issued | 2021-03-15 | - |
dc.identifier.scopus | 2-s2.0-85096692916 | - |
dc.identifier.eissn | 1872-8456 | en_US |
dc.identifier.artn | 113622 | en_US |
dc.description.validate | 202208 bchy | en_US |
dc.description.oa | Accepted Manuscript | en_US |
dc.identifier.FolderNumber | ME-0099 | - |
dc.description.fundingSource | RGC | en_US |
dc.description.fundingSource | Others | en_US |
dc.description.fundingText | National Natural Science Foundation of China | en_US |
dc.description.pubStatus | Published | en_US |
dc.identifier.OPUS | 42889102 | - |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fan_Heterogenous_Columnar-Grained_High-Entropy.pdf | Pre-Published version | 1.43 MB | Adobe PDF | View/Open |
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