کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10620477 988631 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interactions between mechanically generated defects and corrosion phenomena of Zr-based bulk metallic glasses
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Interactions between mechanically generated defects and corrosion phenomena of Zr-based bulk metallic glasses
چکیده انگلیسی
Using the example of a Zr-Ti-Al-Cu-Ni bulk metallic glass with an ex situ approach, two aspects were studied: (i) the effects of pre-formed corrosion pits on the room temperature deformation behaviour, and (ii) the effect of mechanically generated defects on the local corrosion susceptibility. For the latter, Vickers micro-indents generated with different loads were also employed as model defects. It is revealed that pre-formed corrosion pits act as favourable surface sites to which shear bands are linked and most likely nucleate, which leads to a slight reduction in the maximum compression stress. Further, mechanically generated defects have to be considered as critical weak points at a glassy sample surface which can act as preferential sites for local corrosion initiation and propagation. Local chemical and structural changes due to the formation of shear bands as a response to mechanical load are discussed as possible reasons for this. For potential high-load applications of bulk metallic glasses this interaction must be considered as an important lifetime limiting aspect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 60, Issue 5, March 2012, Pages 2300-2309
نویسندگان
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