کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1582905 1514879 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Scale dependent plastic deformation of nanomultilayers with competitive effects of interphase boundary and grain boundary
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Scale dependent plastic deformation of nanomultilayers with competitive effects of interphase boundary and grain boundary
چکیده انگلیسی

Multilayered Ni/Al thin films with different wavelengths (λ) on Si substrate were mechanically characterized using Continuous Stiffness Method (CSM) of nanoindentation, along with the microstructural investigation with X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM). The results revealed that the hardness at a certain indentation depth dramatically increases with the decreasing wavelength. Moreover, there exists a critical wavelength which induces a scale dependent mechanical response to different loading depths and structural factors. For λ > 30 nm, the number of depth-dependent hardness tends to increase with the enhancement of loading depth. However, the highest depth hardness shows the lowest value for λ < 30 nm. By studying both the hardness variation and the characteristic microstructural sizes it can be assessed that there are the competitive effects of interphase boundaries and grain boundaries on deformation resistance of nanomultilayered materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 477, Issues 1–2, 25 March 2008, Pages 295–299
نویسندگان
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