کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1603002 1515971 2015 6 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Indentation hardness and fatigue of the constituents of WC–Co composites
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Indentation hardness and fatigue of the constituents of WC–Co composites
چکیده انگلیسی


• Hardness, modulus and indentation fatigue of WC-Co constituents have been investigated using nanoindentation at 0.25 - 50 mN
• evident load – size effect was found during the indentation of WC grains but was absent in Co binder;
• the heat treatment of the systems has no significant effect on the nanohardness of WC grains;
• hardness, indentation modulus and indentation fatigue anisotropy has been found in WC grains
• different slip mechanisms in the basal and prismatic planes of WC grains were found explaining the identified anisotrophy.

The hardness, reduced modulus and indentation fatigue of the constituents of WC–Co cemented carbides have been investigated at a nanolevel using instrumented indentation in the range of applied loads from 0.25 mN to 50 mN. The influence of indentation load, microstructure, heat treatment and crystallographic orientation of WC grains/crystals has been studied. During random indentation a wide range of hardness values are connected with “mix-mode” indents, when under the indent, in its plastic/process zone not only one phase is present. Heat treatment has only a slight effect on the hardness of the constituent phases. An evident load–size effect was found during the indentation of WC grains but this was absent in the case of the Co binder. Significant influence of the crystallographic orientation of WC crystals on the hardness, indentation modulus and indentation fatigue has been found with enhanced properties in the basal plane.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 49, March 2015, Pages 178–183
نویسندگان
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