کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7971737 | 1514613 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Ta and Nb additions in arc-melted Co-Ni-based superalloys: Microstructural and mechanical properties
ترجمه فارسی عنوان
اثر افزودن تیتانیوم و نیترات در سوپرآلیاژهای بر پایه کووسته ذوب شده: خواص میکرو سازه و مکانیکی
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The current work characterizes the microstructure and mechanical properties of two arc melted Co-Ni-based superalloys containing in atomic percent: 1) Co-40Ni-10Al-7.5W-10Cr-3Ta-0.06B-0.6â¯C and 2) Co-40Ni-10Al-7.5W-10Cr-3Nb-0.06B-0.6â¯C. These two materials named 3Ta and 3Nb, respectively, were characterized by X-Ray diffraction analysis, differential scanning calorimetry, scanning electron microscopy, energy dispersive spectroscopy, electron backscatter diffraction and transmission electron microscopy. Furthermore, compression tests were performed from room temperature up to 1000â¯Â°C. The 3Ta and 3Nb alloys showed different as-cast microstructures that were confirmed by microstructural characterization and Scheil simulations. The phase transformation temperatures of minor phases were measured and calculated using a thermodynamic approach and some discrepancies observed on the calculated γâ²-solvus temperatures reflect that the thermodynamic description of γⲠphase does not take into account the strong partition effect of Ta, Nb and Ti into γâ². As shown by DSC results, the γⲠphase was stable for both alloys up to 1000â¯Â°C, being the main reason for the 3Ta and 3Nb alloys to keep the yield stress above 500â¯MPa.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 730, 11 July 2018, Pages 66-72
Journal: Materials Science and Engineering: A - Volume 730, 11 July 2018, Pages 66-72
نویسندگان
A.M.S. Costa, J.P. Oliveira, M.V. Salgado, C.A. Nunes, E.S.N. Lopes, N.V.V. Mogili, A.J. Ramirez, A.P. Tschiptschin,