کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786272 1465639 2012 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the intrinsic hardness of a metallic film/substrate system: Indentation size and substrate effects
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
On the intrinsic hardness of a metallic film/substrate system: Indentation size and substrate effects
چکیده انگلیسی

To examine effects of indentation size and substrate on the hardness determination of thin films, two typical types of hard film/soft substrate (Ni/Fe) and soft film/hard substrate (Al/Si and Al/glass) systems are investigated. A simple model is proposed to predict the intrinsic hardness of thin films, which allows a more accurate fitting to empirical data and the estimation of ultimate film hardness. The model can be used to interpret indentation data and extrapolate the indentation depth-hardness curve to an important region where indentation depth lies between 1% to 5 times of film thickness. The results are well consistent with the evolving trend of composite hardness obtained from experiments and numerical results by finite element analysis.


► We investigate the indentation size effect and substrate effect on the indentation measurement.
► We develop a new method for extracting the intrinsic hardness from indentation.
► Our model can fit the FEM data from the mechanism-based strain gradient plasticity very well.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 34, July 2012, Pages 1–11
نویسندگان
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