Nanomechanical properties of pristine and heavy ion irradiated nanocrystalline tungsten

被引：14
作者：
El-Atwani, O. [1 ]
Gigax, J. [2 ]
Chancey, M. [1 ]
Baldwin, J. K. S. [2 ]
Maloy, S. A. [1 ]
机构：
[1] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA
[2] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM USA
来源：
SCRIPTA MATERIALIA | 2019年 / 166卷
关键词：
Nanocrystalline; Cantilever; Electron microscopy; Micropillar; Nanohardness; MECHANICAL-PROPERTIES; GRAIN-BOUNDARIES; DEFORMATION;
D O I：
10.1016/j.scriptamat.2019.03.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
引用
收藏
页码：159 / 163
页数：5
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