کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5205713 1502937 2016 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sensitivity of nanoindentation strain rate in poly(ester-ester-ketone) using atomic force microscopy
ترجمه فارسی عنوان
حساسیت نرخ تنش نانوذرات در پلی استری استر کتون با استفاده از میکروسکوپ نیروی اتمی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
The effect of strain rate on poly(ester-ester-ketone) (PEEK) was investigated using an atomic force microscopy (AFM) based nanoindentation technique and applying a wide range of strain rates (0.012 s−1-1 s−1). The test results show that the average hardness and elastic modulus of PEEK follow a linear model with respect to logarithm of strain rate, from 263.9 MPa/1.377 GPa to 323.1 MPa/2.477 GPa. The maximum indentation depth decreased from 287.1 nm to 239.6 nm, indicating an enhanced densification area and shear transform zones under the indentation region. The plasticity index showed a rapid increase at low strain rate and kept stable at ∼0.640 until a strain-rate of 0.037 s−1. Moreover, a 'pile-up' phenomenon appeared around the residual indentation area due to more free volume around the cube-corner indenter than a Berkovich indenter during the loading process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 53, August 2016, Pages 85-88
نویسندگان
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