Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper
Helium bubbles are one of the typical radiation microstructures in metals and alloys, significantly influencing their deformation behavior. However, the dynamic evolution of helium bubbles under straining is less explored so far. Here, by using in situ micromechanical testing inside a transmission e...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/109713 https://orcid.org/0000-0002-7841-8058 |
| _version_ | 1811081162276208640 |
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| author | Ding, Ming-Shuai Tian, Lin Han, Wei-Zhong Ma, Evan Shan, Zhi-Wei Li, Ju |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Ding, Ming-Shuai Tian, Lin Han, Wei-Zhong Ma, Evan Shan, Zhi-Wei Li, Ju |
| author_sort | Ding, Ming-Shuai |
| collection | MIT |
| description | Helium bubbles are one of the typical radiation microstructures in metals and alloys, significantly influencing their deformation behavior. However, the dynamic evolution of helium bubbles under straining is less explored so far. Here, by using in situ micromechanical testing inside a transmission electron microscope, we discover that the helium bubble not only can coalesce with adjacent bubbles, but also can split into several nanoscale bubbles under tension. Alignment of the splittings along a slip line can create a bubble-free channel, which appears softer, promotes shear localization, and accelerates the failure in the shearing-off mode. Detailed analyses unveil that the unexpected bubble fragmentation is mediated by the combination of dislocation cutting and internal surface diffusion, which is an alternative microdamage mechanism of helium irradiated copper besides the bubble coalescence. |
| first_indexed | 2024-09-23T11:42:27Z |
| format | Article |
| id | mit-1721.1/109713 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:42:27Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1097132022-09-27T21:21:48Z Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper Ding, Ming-Shuai Tian, Lin Han, Wei-Zhong Ma, Evan Shan, Zhi-Wei Li, Ju Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Li, Ju Helium bubbles are one of the typical radiation microstructures in metals and alloys, significantly influencing their deformation behavior. However, the dynamic evolution of helium bubbles under straining is less explored so far. Here, by using in situ micromechanical testing inside a transmission electron microscope, we discover that the helium bubble not only can coalesce with adjacent bubbles, but also can split into several nanoscale bubbles under tension. Alignment of the splittings along a slip line can create a bubble-free channel, which appears softer, promotes shear localization, and accelerates the failure in the shearing-off mode. Detailed analyses unveil that the unexpected bubble fragmentation is mediated by the combination of dislocation cutting and internal surface diffusion, which is an alternative microdamage mechanism of helium irradiated copper besides the bubble coalescence. National Science Foundation (U.S.) (DMR-1410636) 2017-06-07T17:45:47Z 2017-06-07T17:45:47Z 2016-11 2016-08 2016-11-16T23:00:03Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/109713 Ding, Ming-Shuai; Tian, Lin; Han, Wei-Zhong; Li, Ju; Ma, Evan and Shan, Zhi-Wei. "Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper." Physical Review Letters 117, 215501: 1-5 © 2016 American Physical Society https://orcid.org/0000-0002-7841-8058 en http://dx.doi.org/10.1103/PhysRevLett.117.215501 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Ding, Ming-Shuai Tian, Lin Han, Wei-Zhong Ma, Evan Shan, Zhi-Wei Li, Ju Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper |
| title | Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper |
| title_full | Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper |
| title_fullStr | Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper |
| title_full_unstemmed | Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper |
| title_short | Nanobubble Fragmentation and Bubble-Free-Channel Shear Localization in Helium-Irradiated Submicron-Sized Copper |
| title_sort | nanobubble fragmentation and bubble free channel shear localization in helium irradiated submicron sized copper |
| url | http://hdl.handle.net/1721.1/109713 https://orcid.org/0000-0002-7841-8058 |
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