کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1582029 1514867 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructural inhomogeneities introduced in a Zr-based bulk metallic glass upon low-temperature annealing
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Microstructural inhomogeneities introduced in a Zr-based bulk metallic glass upon low-temperature annealing
چکیده انگلیسی

Due to their exceptionally high yield strength and yield strain as compared to conventional metallic materials, bulk metallic glasses (BMGs) represent a class of promising engineering materials for structural applications. However, inhomogeneous deformation and severe shear localization at ambient temperature often lead to early failure and limit their reliability as structural materials. Heat treatments around the glass transition temperature (Tg) generally aggravate the intrinsic brittleness of BMGs. In this paper, we report on the evolution of a nanoscale inhomogeneous microstructure upon low-temperature annealing in a Zr55Cu30Al10Ni5 BMG. This important outcome is explained by the experimentally observed tendency for chemical decomposition between Cu and Zr of the investigated amorphous system and is in accordance with literature data on various Zr–Cu-based amorphous alloys. Finally, these local fluctuations influence the plasticity of BMGs beneficially, in contrast of the generally accepted embrittlement upon annealing.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 491, Issues 1–2, 15 September 2008, Pages 124–130
نویسندگان
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