کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5466141 1517980 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of surface oxides on the mechanical response of oxidized grain boundaries
ترجمه فارسی عنوان
تأثیر اکسید سطحی بر پاسخ مکانیکی مرزهای دانه اکسید شده
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی


- Mechanical properties of oxidized grain boundaries measured with microcantilevers
- A surface oxide was found to influence the mechanical response.
- Cohesive surface finite element modeling can be used to reproduce the observed failure.

The mechanical response of oxidized grain boundaries in a nickel alloy used for nuclear applications has been investigated by performing microcantilever bend tests. It was found that whilst failure can proceed along the oxide-metal interface not all oxidized grain boundaries exhibit intergranular failure. The presence of an external surface oxide has been identified as playing a crucial role in influencing the mechanical response. By removing the surface oxide, using a focused ion beam, tests were performed on the same grain boundaries with and without a surface oxide layer, and showed that surface oxides can suppress or delay fracture. Taking into account the effect of the surface oxide on microcantilever tests, it was possible to present the most accurate parameterization of the local stress at failure of oxidized grain boundaries to date and to predict the experimentally observed behavior via realistic cohesive damage finite element simulations, which further underline the experimental observations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 632, 30 June 2017, Pages 17-22
نویسندگان
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