کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1584432 1514903 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of indenter tip roundness on hardness behavior in nanoindentation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Influence of indenter tip roundness on hardness behavior in nanoindentation
چکیده انگلیسی

In this paper, the effect of indenter tip roundness on hardness behavior for two typical elastic perfectly plastic materials is studied by means of finite element simulation. A rigid conical indenter of semi apex angle 70.3° fitted smoothly with a spherical tip is employed. It is shown that as the indentation depth increases hardness first rises from zero, reaches a maximum and then decreases slowly approaching asymptotically the limiting value equal to that due to a conical indenter of ideally sharp tip. The range within which hardness varies appreciably is comparable to the radius of the indenter tip. The difference between the maximum value and the limiting value depends on the yield stress over the Young's modulus ratio. The smaller this ratio the greater the difference is. Numerical simulation also provides an opportunity for checking the accuracy and limitations of the widely used Oliver–Pharr method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 445–446, 15 February 2007, Pages 323–327
نویسندگان
, , , , ,