A new approach to evaluate irradiation hardening of ion-irradiated ferritic alloys by nano-indentation techniques
A new approach to evaluate irradiation hardening of ion-irradiated ferritic alloys by nano-indentation techniques
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DOI：
10.1016/j.fusengdes.2011.03.073
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发表时间：
2011-10-01
影响因子：
1.7
通讯作者：
Kimura, Akihiko
中科院分区：
文献类型：
--
作者：
Kasada, Ryuta;Takayama, Yoshiyuki;Kimura, Akihiko
本工作研究铁基模型铁素体合金的铁离子辐照实验后的辐照硬化，以推断基于机械的名义硬度从纳米压痕测试离子辐照表面。离子辐照实验在290 ℃下用6.4 MeV Fe（3+）离子进行。恒刚度测量（CSM）用于获得硬度的深度分布。基于Nix-Gao模型和扩展的薄膜/基体系统硬度模型对实验结果进行了分析和讨论。CSM深度传感纳米压痕技术表明，未辐照的铁基模型合金的硬度梯度可以通过压痕尺寸效应（伊势）来解释。另一方面，这些样品的离子辐照表面的梯度不仅包括伊势，但也软衬底效应（SSE）。我们提出了一种新的方法来评估标称硬度，这可能会连接到体积硬度，从实验获得的纳米硬度深度分布数据。(C)2011爱思唯尔有限公司版权所有。
The present work investigates the irradiation hardening of Fe-based model ferritic alloys after Fe-ion irradiation experiments in order to deduce mechanistically based nominal hardness from the nanoindentation tests on the ion-irradiated surface. Ion-irradiation experiments were carried out at 290 degrees C with 6.4 MeV Fe(3+) ions. The constant stiffness measurement (CSM) was used to obtain the depth-profile of hardness. The results has been analyzed and discussed based on the Nix-Gao model and an extended film/substrate system hardness model. The depth-sensing nano-indentation techniques with CSM revealed that the hardness gradient of the unirradiated Fe-based model alloy can be explained through the indentation size effect (ISE). On the other hand, the gradient of ion-irradiated surface of these samples includes not only the ISE but also softer substrate effect (SSE). We propose a new approach to evaluate a nominal hardness, which may connect to the bulk hardness, from experimentally obtained nano-hardness depth profile data. (C) 2011 Elsevier B.V. All rights reserved.