کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1451220 988764 2005 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of shear band evolution in amorphous alloys beneath a Vickers indentation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Investigation of shear band evolution in amorphous alloys beneath a Vickers indentation
چکیده انگلیسی

Shear band formation has been known to be the dominant deformation mechanism at room temperature in bulk metallic glasses. However, many indentation studies have revealed only a few shear bands surrounding the indent on the top surface of the specimen. This small number of shear bands cannot account for the large plastic deformation beneath the indentations. Therefore, a bonded interface technique has been used to observe the slip-steps due to shear bands evolution. Vickers indentations were performed along the interface at increasing loads. At small indentation loads, the plastic deformation was primarily accommodated by semi-circular primary shear bands surrounding the indentation. At higher loads, secondary and tertiary shear bands were formed inside this plastic zone. A modified expanding cavity model was used to predict the plastic zone size characterized by the shear bands and to identify the stress components responsible for the evolution of various types of shear bands.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 53, Issue 14, August 2005, Pages 3849–3859
نویسندگان
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