کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1636649 | 1516957 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of growth rate on microstructure and solute distribution of Al-Zn-Mg alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of growth rate on microstructure and solute distribution of Al-Zn-Mg alloy Effect of growth rate on microstructure and solute distribution of Al-Zn-Mg alloy](/preview/png/1636649.png)
چکیده انگلیسی
An Al-5.3%Zn-5.3%Mg alloy was unidirectionally solidified to determine morphological transition and solute distribution by a modification of the Bridgman technique for crystal growth with growth rates ranging from 4-500 μm/s and a temperature gradient of 25 K/cm. It was determined that growth rates from 6.5-9.5 μm/s generated a cell morphology, where the lower limit corresponds to the plane front to cellular transition and the upper limit indicates the cellular to columnar dendrite transition. The microstructures of the alloys solidified from 30 μm/s to growth rates less than 500 μm/s were mainly composed of columnar dendrites, while the microstructures solidified at growth rates greater than 500 μm/s were equiaxed. Regarding experimental results on solute distribution, a prediction of the model developed by Rappaz and Boettinger for dendrite solidification of multicomponent alloys was applied with excellent agreement. Results of solute distribution were employed to derive the precipitation fraction of Ï-phase needed to increase the electrochemical properties of the alloy to be used as an Al-sacrificial anode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 5, May 2015, Pages 1391-1398
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 5, May 2015, Pages 1391-1398
نویسندگان
A.L. RAMIREZ-LEDESMA, R.A. RODRÍGUEZ-DÍAZ, J. CHAVEZ-CARVAYAR, O. ALVAREZ-FREGOSO, J.A. JUAREZ-ISLAS,