کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1600935 1005180 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flow serration and shear-band viscosity during inhomogeneous deformation of a Zr-based bulk metallic glass
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Flow serration and shear-band viscosity during inhomogeneous deformation of a Zr-based bulk metallic glass
چکیده انگلیسی

Uniaxial compressive behavior of Zr64.13Cu15.75Ni10.12Al10 bulk metallic glass at room temperature was characterized with high-sensitivity strain gauges directly attached to test samples. Displacement–time curves exhibited micron-size serrations (or bursts) after the onset of yielding, apparently associated with discrete shear band formation. Each displacement burst disclosed three-step (acceleration, steady-state, and deceleration) process in shear band propagation. The viscosity of a propagating shear band was found to be relatively low and, actually, in a similar range usually measured in the supercooled liquid region. A detailed analysis of the experimental results using a self-consistent Vogel–Fulcher–Tamann (VFT) equation based on free volume model suggested that shear band propagation was mainly resulted from free volume accumulation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 17, Issue 9, September 2009, Pages 762–767
نویسندگان
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