کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11007018 | 1514608 | 2018 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication, microstructure refinement and strengthening mechanisms of nanosized SiCP/Al composites assisted ultrasonic vibration
ترجمه فارسی عنوان
ساخت، پاکسازی ریزساختار و مکانیسم های تقویت نانوسیم های سیلیکون / آلومینیوم کمک به ارتعاشات فراصوتی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The performances of particulate-reinforced aluminum matrix composites are strongly dependent on alloying elements, precipitates and added particulates. To reveal the sole influence mechanisms of high volume fraction of nanosized particulates on the solidification behavior, microstructure and mechanical properties of aluminum alloys, nanosized SiCP (60â¯nm) was incorporated into commercial pure Al at different volume fractions (i.e., 0, 1, 3, 5, 7 and 9â¯vol%) by stir-casting assisted ultrasonic vibration. The results reveal that a fairly uniform dispersion of nanosized SiCP throughout the matrix was achieved at a volume fraction as high as 7â¯vol%. Average α-Al dendritic sizes were significantly refined from 270â¯Âµm for the matrix to 90â¯Âµm in the solidified microstructure of nanocomposites. Thermal analysis during solidification indicates that the presence of nanosized SiCP increased the nucleation temperature of α-Al, whilst recalescence during solidification process disappeared. Additionally, the yield and ultimate tensile strength of the nanosized SiCP/Al composites at both ambient temperature and 453â¯K were remarkably improved, whilst remaining suitable fracture strain. Theoretical analysis suggests that the significant strength increments induced by nanosized SiCP at ambient temperature could be attributed to thermal mismatch strengthening, Orowan strengthening and grain refinement strengthening, while the pinning effect of nanosized SiCP could predominantly account for the strengthening effect at 453â¯K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 735, 26 September 2018, Pages 310-317
Journal: Materials Science and Engineering: A - Volume 735, 26 September 2018, Pages 310-317
نویسندگان
Qiang Li, Feng Qiu, Bai-Xin Dong, Run Geng, Ming-ming Lv, Qing-Long Zhao, Qi-Chuan Jiang,