کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7993292 | 1516151 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of molybdenum on phases, microstructure and mechanical properties of Al0.5CoCrFeMoxNi high entropy alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Effect of molybdenum on phases, microstructure and mechanical properties of Al0.5CoCrFeMoxNi (xâ¯=â¯0-0.5â¯mol) high entropy alloys has been investigated in this paper. The microstructure, phase constituents and mechanical properties of the alloys have been studied using scanning electron microscopy, X-ray diffraction, transmission electron microscopy, compressive and hardness tests. The possible equilibrium phases existing in the alloys have also been evaluated using the Thermo-Calc program. The as-cast Al0.5CoCrFeMoxNi alloys have typical dendrite microstructure. The alloys with xâ¯=â¯0 and 0.1 consist of FCC and (Ni,Al)-rich ordered BCC phase, while the other four alloys are composed of FCC, (Ni,Al)-rich ordered BCC phase and (Cr,Mo)-rich Ï phase. The thermodynamic calculation shows that Mo changes the phase formation order, mole fraction and composition of the equilibrium phases in the Al0.5CoCrFeMoxNi alloys. The addition of Mo enhances formation of Ï phase in the Al0.5CoCrFeMoxNi alloys, improves the hardness and compressive strength of as-cast alloys, and reduces the ductility of the alloys. The Al0.5CoCrFeMo0.3Ni and Al0.5CoCrFeMo0.4Ni alloys have balanced properties of compressive strength and ductility. Al0.5CoCrFeMo0.3Ni alloy has a Ï0.2 of 814â¯MPa, an ultimate strength of 2101â¯MPa, and a fracture strain of 31%, while Al0.5CoCrFeMo0.4Ni alloy has a Ï0.2 of 1091â¯MPa, an ultimate strength of 2117â¯MPa, and a fracture strain of 18%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 743, 30 April 2018, Pages 514-522
Journal: Journal of Alloys and Compounds - Volume 743, 30 April 2018, Pages 514-522
نویسندگان
Y.X. Zhuang, X.L. Zhang, X.Y. Gu,