Small-scale characterisation of irradiated nuclear materials: Part II nanoindentation and micro-cantilever testing of ion irradiated nuclear materials
Small-scale characterisation of irradiated nuclear materials: Part II nanoindentation and micro-cantilever testing of ion irradiated nuclear materials
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DOI：
10.1016/j.jnucmat.2015.01.053
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发表时间：
2015-07-01
影响因子：
3.1
通讯作者：
Roberts, S. G.
中科院分区：
文献类型：
--
作者：
Armstrong, D. E. J.;Hardie, C. D.;Roberts, S. G.
本文展示了基于FIB加工微悬臂梁的先进微力学测试方法在不受底层未注入材料影响的情况下测量离子注入层力学性能的能力。第一部分描述了铁离子注入铁- 12wt %铬合金的研究。结果表明，通过精心的悬臂梁设计和有限元模拟，即使有很强的尺寸效应的影响，也可以测量出植入后屈服应力的变化。第二部分描述了使用球形和尖锐纳米压痕以及微悬臂梁对钨离子和钨氦离子注入钨的研究。球形压痕允许测量植入层的屈服性能和加工硬化行为。然而，植入钨的脆性只有在使用微悬臂梁时才显现出来。这表明，当将微力学方法应用于离子注入层时，需要了解尺寸效应的本质，需要对实验过程进行仔细的建模，需要多种实验技术来收集最大数量的力学行为信息。(C) 2015年Elsevier B.V.出版
This paper demonstrates the ability of advanced micro-mechanical testing methods, based on FIB machined micro-cantilevers, to measure the mechanical properties of ion implanted layers without the influence of underlying unimplanted material. The first section describes a study of iron-12 wt% chromium alloy implanted with iron ions. It is shown that by careful cantilever design and finite element modelling that changes in yield stress after implantation can be measured even with the influence of a strong size effect. The second section describes a study of tungsten implanted with both tungsten ions and tungsten and helium ions using spherical and sharp nanoindentation, and micro-cantilevers. The spherical indentation allows yield properties and work hardening behaviour of the implanted layers to be measured. However the brittle nature of the implanted tungsten is only revealed when using micro-cantilevers. This demonstrates that when applying micro-mechanical methods to ion implanted layers care is needed to understand the nature of size effects, careful modelling of experimental procedure is required and multiple experimental techniques are needed to allow the maximum amount of mechanical behaviour information to be collected. (C) 2015 Published by Elsevier B.V.