کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1665258 | 1518035 | 2014 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructural and elasto-plastic material parameters identification by inverse finite elements method of Ti(1 â x)AlxN (0 < x < 1) sputtered thin films from Berkovich nano-indentation experiments
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Knowing the elastic properties of these films, inverse finite elements analysis of the indentation curves considering a simple isotropic linear elasto-plastic behavior allows, as a function of the composition, the yield stress ÏY and the linear hardening coefficient Hpâ to be estimated. ÏY and Hpâ are in the ranges 4.2 to 6.8 GPa and 60 to 400 GPa, respectively. The maximum value of Hpâ/ÏY which characterizes the ability of these coatings to exhibit plastic strain hardening is maximum for x = 0.5 and 0.6. The quality of the estimation was discussed through a practical identifiability study and quantified using an identifiability index. Tip radius and elasticity of the Berkovich indenter are two very relevant parameters to improve identifiability and correctly extract the plastic parameters of the behavior law. Scratch crack propagation resistance shows an evolution similar to those of Hpâ/ÏY.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 569, 31 October 2014, Pages 81-92
Journal: Thin Solid Films - Volume 569, 31 October 2014, Pages 81-92
نویسندگان
M.-J. Pac, S. Giljean, C. Rousselot, F. Richard, P. Delobelle,