Nanomechanical properties of pristine and heavy ion irradiated nanocrystalline tungsten. (June 2019)

• Record Type: Journal Article
• Authors: El-Atwani, O.; Gigax, J.; Chancey, M.; Baldwin, J.K.S.; Maloy, S.A.
• Is Part Of: Scripta materialia. Number 166(2019)
• Page Start: 159
• Page End: 163
• Publication Date: 2019-06
• Subjects: Nanocrystalline -- Cantilever -- Electron microscopy -- Micropillar -- Nanohardness; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.03.014
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Nanocrystalline materials are postulated as strong candidates for nuclear materials applications due to their high irradiation tolerance manifested by their high grain boundary density. Their mechanical properties before and after irradiation, however, are a concern. Nanoindentation, micropillar compression and cantilever bending tests were performed on nanocrystalline tungsten films (grain size less than 35 nm) prior to and post irradiation at high temperature (1050 K) with heavy ions. Their performance under different stress states corresponding to the different tests was evaluated. Characterizing un-irradiated and irradiated nanocrystalline materials was shown to be best performed using a combination of different micromechanical tests. Graphical abstract: Unlabelled Image