Liquid metal embrittlement of a dual-phase Al0.7CoCrFeNi high-entropy alloy exposed to oxygen-saturated lead-bismuth eutectic
© 2020 This paper reports a new liquid metal embrittlement (LME) system in which a dual-phase Al0.7CoCrFeNi (equimolar fraction) high-entropy alloy (HEA) is embrittled by lead-bismuth eutectic (LBE) at 350 and 500°C. At 350°C, (Ni, Al)-rich BCC phase is embrittled, leading to intragrain cracking wit...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Elsevier BV
2021
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| Online Access: | https://hdl.handle.net/1721.1/136171 |
| _version_ | 1826188433022779392 |
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| author | Gong, Xing Xiang, Congying Auger, Thierry Chen, Jiajun Liang, Xiaocong Yu, Zhiyang Short, Michael P Song, Min Yin, Yuan |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Gong, Xing Xiang, Congying Auger, Thierry Chen, Jiajun Liang, Xiaocong Yu, Zhiyang Short, Michael P Song, Min Yin, Yuan |
| author_sort | Gong, Xing |
| collection | MIT |
| description | © 2020 This paper reports a new liquid metal embrittlement (LME) system in which a dual-phase Al0.7CoCrFeNi (equimolar fraction) high-entropy alloy (HEA) is embrittled by lead-bismuth eutectic (LBE) at 350 and 500°C. At 350°C, (Ni, Al)-rich BCC phase is embrittled, leading to intragrain cracking within this phase, while the predominant cracking mode changes to BCC/FCC phase boundary decohesion at 500°C. At both temperatures, cracks are rarely seen in the (Co, Cr, Fe)-rich FCC phase, indicating that this phase is immune to LME. Furthermore, the results suggest a transition from an adsorption-dominated LME mechanism at 350°C to a phase boundary wetting-dominated LME mechanism at 500°C. |
| first_indexed | 2024-09-23T07:59:34Z |
| format | Article |
| id | mit-1721.1/136171 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T07:59:34Z |
| publishDate | 2021 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1361712023-02-16T20:55:20Z Liquid metal embrittlement of a dual-phase Al0.7CoCrFeNi high-entropy alloy exposed to oxygen-saturated lead-bismuth eutectic Gong, Xing Xiang, Congying Auger, Thierry Chen, Jiajun Liang, Xiaocong Yu, Zhiyang Short, Michael P Song, Min Yin, Yuan Massachusetts Institute of Technology. Department of Nuclear Science and Engineering © 2020 This paper reports a new liquid metal embrittlement (LME) system in which a dual-phase Al0.7CoCrFeNi (equimolar fraction) high-entropy alloy (HEA) is embrittled by lead-bismuth eutectic (LBE) at 350 and 500°C. At 350°C, (Ni, Al)-rich BCC phase is embrittled, leading to intragrain cracking within this phase, while the predominant cracking mode changes to BCC/FCC phase boundary decohesion at 500°C. At both temperatures, cracks are rarely seen in the (Co, Cr, Fe)-rich FCC phase, indicating that this phase is immune to LME. Furthermore, the results suggest a transition from an adsorption-dominated LME mechanism at 350°C to a phase boundary wetting-dominated LME mechanism at 500°C. 2021-10-27T20:31:14Z 2021-10-27T20:31:14Z 2021 2021-08-12T13:54:09Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136171 en 10.1016/J.SCRIPTAMAT.2020.113652 Scripta Materialia Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier BV SSRN |
| spellingShingle | Gong, Xing Xiang, Congying Auger, Thierry Chen, Jiajun Liang, Xiaocong Yu, Zhiyang Short, Michael P Song, Min Yin, Yuan Liquid metal embrittlement of a dual-phase Al0.7CoCrFeNi high-entropy alloy exposed to oxygen-saturated lead-bismuth eutectic |
| title | Liquid metal embrittlement of a dual-phase Al0.7CoCrFeNi high-entropy alloy exposed to oxygen-saturated lead-bismuth eutectic |
| title_full | Liquid metal embrittlement of a dual-phase Al0.7CoCrFeNi high-entropy alloy exposed to oxygen-saturated lead-bismuth eutectic |
| title_fullStr | Liquid metal embrittlement of a dual-phase Al0.7CoCrFeNi high-entropy alloy exposed to oxygen-saturated lead-bismuth eutectic |
| title_full_unstemmed | Liquid metal embrittlement of a dual-phase Al0.7CoCrFeNi high-entropy alloy exposed to oxygen-saturated lead-bismuth eutectic |
| title_short | Liquid metal embrittlement of a dual-phase Al0.7CoCrFeNi high-entropy alloy exposed to oxygen-saturated lead-bismuth eutectic |
| title_sort | liquid metal embrittlement of a dual phase al0 7cocrfeni high entropy alloy exposed to oxygen saturated lead bismuth eutectic |
| url | https://hdl.handle.net/1721.1/136171 |
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