کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1602608 1515964 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Implementation of an effective time-saving two-stage methodology for microstructural characterization of cemented carbides
ترجمه فارسی عنوان
پیاده سازی یک روش دو مرحلهای برای صرفه جویی در زمان صرفه جویی در ویژگی های میکرو سازه کاربید سیمان
کلمات کلیدی
کاربید سیمان، اندازه دانه کربید، پیوستگی کاربید، ریز ساختار، تجزیه و تحلیل تصویر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی


• A semi-automatic image analysis procedure for grain size determination is detailed.
• Excellent grain size correlation between image analysis and linear interception
• An empirical relation for estimating carbide contiguity in hardmetals is proposed.
• Simultaneous influence of the binder content and mean grain size on contiguity
• Two-stage time-saving methodology for WC–Co microstructural characterization

Linear intercept on scanning electron microscopy micrographs is the most commonly used measurement method to determine carbide grain size and contiguity in WC–Co cemented carbides (hardmetals). However, it involves manual time-consuming measurements and is critically dependent on the quality of the micrographs as well as on the identification and definition of grain boundaries. In this study a two-stage methodology for microstructural characterization of hardmetals is presented. First, a digital semi-automatic image analysis procedure for grain size determination of the carbide phase is presented. It involves an experimental assessment of grain size on processed images corresponding to a series of WC–Co and WC–Ni cemented carbide grades with different microstructural characteristics. Obtained results are then compared to the values obtained by means of the linear intercept technique. A good correlation between the mean grain sizes determined following both measurement techniques was attained. Based on experimental findings, a series of empirical relations were found to correlate grain size distributions obtained following both methods. Second, an empirical relation for estimating carbide contiguity in WC–Co cemented carbides is proposed. This relation considers simultaneously the influence of the binder content and the experimentally determined mean grain size on contiguity. The proposed equation for contiguity estimation is based on extensive data collection from open literature. An excellent agreement was attained between contiguity values estimated from such equation and those obtained using the linear intercept technique. This validates the two-stage procedure as an effective time-saving methodology for microstructural characterization of WC–Co cemented carbides.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 55, February 2016, Pages 80–86
نویسندگان
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