کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8011915 1516933 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of ultrasonic treatment on formation of primary Al3Zr in Al-0.4Zr alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Influence of ultrasonic treatment on formation of primary Al3Zr in Al-0.4Zr alloy
چکیده انگلیسی
The effect of ultrasonic treatment on the formation of primary Al3Zr was investigated by applying ultrasound to an Al-0.4Zr alloy. Three temperature ranges were selected, i.e., 830 to 790 °C (above liquidus), 790 to 750 °C (cross liquidus) and 750 to 710 °C (below liquidus) for ultrasonication. Using the scanning electron microscopy, both the size and morphology of the primary Al3Zr particles were examined. It was found that the size was significantly reduced and the morphology changed from large throwing-star shape to small compact tablet shape. The mechanisms for refinement of primary Al3Zr were discussed. It is suggested that sonocrystallization theory via activation of aluminium oxide particles is responsible for the refinement of primary Al3Zr when ultrasonic melt treatment (UST) is applied within the fully liquid state. The refinement of primary Al3Zr particles when UST is applied in the slurry (growth stage) is due to the sonofragmentation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 27, Issue 5, May 2017, Pages 977-985
نویسندگان
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