Impact of krypton irradiation on a single crystal tungsten: Multi-modal X-ray imaging study

SCRIPTA MATERIALIA

卷:188

Article

Gill, Simerjeet K.¹  Topsakal, Mehmet¹  Jossou, Ericmoore¹  Huang, Xiaojing²  Hattar, Khalid³  Mausz, Julia⁴  Elbakhshwan, Mohamed⁵  Yan, Hanfei²  Chu, Yong S.²  Sun, Cheng⁶  He, Lingfeng⁶  Gan, Jian⁶  Ecker, Lynne¹ 

[1] Brookhaven Natl Lab, Nucl Sci & Technol Dept, Upton, NY 11973 USA

[2] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA

[3] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA

[4] Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany

[5] Univ Wisconsin, Engn Phys Dept, Madison, WI 53706 USA

[6] Idaho Natl Lab, Idaho Falls, ID 83415 USA

关键词: Strain mapping;    Ion irradiation;    Microstructure;    Synchrotron radiation;    Scanning transmission electron microscopy (STEM);   

DOI  :  10.1016/j.scriptamat.2020.07.024

来源: Elsevier

【 摘 要 】

Understanding microstructural and strain evolutions induced by noble gas production in the nuclear fuel matrix or plasma-facing materials is crucial for designing next generation nuclear reactors, as they are responsible for volumetric swelling and catastrophic failure. We describe a multimodal approach combining synchrotron-based nanoscale X-ray imaging techniques with atomic-scale electron microscopy techniques for mapping chemical composition, morphology and lattice distortion in a single crystal W induced by Kr irradiation. We report that Kr-irradiated single crystal W undergoes surface deformation, forming Kr containing cavities. Furthermore, positive strain fields are observed in Kr-irradiated regions, which lead to compression of underlying W matrix. Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

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