Dynamic Void Growth and Shrinkage in Mg under Electron Irradiation
Journal Article
·
· Materials Research Letters
- North Carolina State Univ., Raleigh, NC (United States). Dept. of Materials Science and Engineering
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Mecanical Engineering
- U.S. Army Research Office, Research Triangle Park, NC (United States). Materials Science Division
We report in-situ atomic-scale investigation of void evolution, including growth, coalescence and shrinkage, under electron irradiation. With increasing irradiation dose, the total volume of voids increased linearly, while nucleation rate of new voids decreased slightly, and the total number of voids decreased. Some voids continued to grow while others shrank to disappear, depending on the nature of their interactions with nearby self-interstitial loops. For the first time, surface diffusion of adatoms was observed largely responsible for the void coalescence and thickening. These findings provide fundamental understanding to help with the design and modeling of irradiation-resistant materials.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1179092
- Report Number(s):
- INL/JOU-14-31014; TRN: US1500192
- Journal Information:
- Materials Research Letters, Vol. 2, Issue 3; ISSN 2166-3831
- Publisher:
- Taylor & Francis
- Country of Publication:
- United States
- Language:
- English
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