Compression of self-ion implanted iron micropillars
Compression of self-ion implanted iron micropillars
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DOI：
10.1016/j.jnucmat.2012.06.014
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发表时间：
2012-11-01
影响因子：
3.1
通讯作者：
Roberts, S. G.
中科院分区：
文献类型：
--
作者：
Grieveson, E. M.;Armstrong, D. E. J.;Roberts, S. G.
离子注入会导致材料发生位移损伤，从而形成小的位错环，并可能导致材料机械性能的变化。纯铁样品在 275 摄氏度下进行 Fe+ 注入，产生约 6 dpa 至约 1 μm 深度的损伤。与未植入的材料相比，植入材料的纳米压痕显示硬度有所增加。微柱是在植入和未植入材料的横截面样本中制造的，并使用纳米压痕仪进行压缩。注入柱的变形模式与未注入柱明显不同，但屈服应力没有变化。这表明纳米压痕和微柱压缩之间的变形控制机制不同，如果使用微柱压缩来提取辐照材料的体积特性，则需要小心。 (C) 2012 Elsevier B.V. 保留所有权利。
Ion implantation causes displacement damage in materials, leading to the formation of small dislocation loops and can cause changes to the material's mechanical properties. Samples of pure Fe were subjected to Fe+ implantation at 275 degrees C, producing damage of similar to 6 dpa to similar to 1 mu m depth. Nanoindentation into implanted material shows an increase in hardness compared to unimplanted material. Micropillars were manufactured in cross-section specimens of implanted and unimplanted material and compressed using a nanoindenter. The implanted pillars have a deformation mode which differs markedly from the unimplanted pillars but show no change in yield-stress. This suggests that the controlling mechanism for deformation is different between nanoindentation and micropillar compression and that care is needed if using micropillar compression to extract bulk properties of irradiated materials. (C) 2012 Elsevier B.V. All rights reserved.