کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1604124 1516000 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dependence of microcrack number density on microstructural parameters during plastic deformation of WC-Co composite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Dependence of microcrack number density on microstructural parameters during plastic deformation of WC-Co composite
چکیده انگلیسی
Previous studies have shown that WC-Co material can plastically deform during indentation test, and microcracking is one of the dominant mechanisms for the plastic deformation. Microcracks follow several paths of microstructure: transgranular cracks within WC grains, intergranular cracks along grain boundary and cracks at WC/Co interface. In this study, six commercial grades of WC-Co material were tested using the Hertzian indentation technique at the same indentation load with the same size of an indenter. The microcrack number density of each grade was measured and its correlation with microstructural parameters was analyzed. Materials with high cobalt content, large grain size, large mean free path and low contiguity form more microcracks in the course of plastic deformation. The microcrack number density is also correlated with mechanical properties. High microcrack number density corresponds to low hardness and high toughness. The mechanism of how the microcracking affects the fracture toughness is also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 28, Issue 3, May 2010, Pages 434-440
نویسندگان
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