کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1499584 993313 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Homogeneous deformation of metallic glass at room temperature reveals large dilatation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Homogeneous deformation of metallic glass at room temperature reveals large dilatation
چکیده انگلیسی

Room-temperature uniaxial compression of Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glass at 80% of the yield stress leads to homogeneous viscous flow. The flow in this apparently elastic regime reveals large increases in volume associated with local shearing events in the glass. The extent of this dilatation is masked in more usual tests by significant relaxation of the glass structure during and after shear. The dilatation in deformed metallic glasses can no longer be attributed only to free-volume generation at shear bands.

Research highlights
► We study compressive loading of a metallic glass below the yield stress.
► The directly measured density decrease verifies earlier indirect inferences.
► There is a dilatation of roughly one atomic volume per atom involved in shear.
► Volume changes cannot now be attributed only to shear bands.
► The relative changes of shear and bulk moduli are not as expected.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scripta Materialia - Volume 64, Issue 10, May 2011, Pages 966–969
نویسندگان
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