کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5456681 | 1514666 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and superplasticity of the as-cast Mg-9Al-1Zn magnesium alloy after high-ratio differential speed rolling
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructure and superplasticity of the as-cast Mg-9Al-1Zn magnesium alloy after high-ratio differential speed rolling Microstructure and superplasticity of the as-cast Mg-9Al-1Zn magnesium alloy after high-ratio differential speed rolling](/preview/png/5456681.png)
چکیده انگلیسی
The direct application of high-ratio differential speed rolling (HRDSR) on the cast microstructure of Mg-9Al-1Zn (AZ91) alloy resulted in significant refinement of grain size and divorced eutectic β-phase with semi-network structure. Nanosized β-phase particles (50-100 nm) precipitated at grain boundaries and within grains from the Al-rich α-phase, which formed as a result of fragmentation and decomposition of the divorced eutectic β-phase during severe plastic deformation by HRDSR. The HRDSR-processed AZ91 alloy exhibited excellent superplasticity at low temperatures below 573 K. The optimum superplasticity (with a maximum tensile elongation of 830%) was achieved at 573 K at 1 à 10â3 sâ1. Beyond 573 K, serious deterioration in superplasticity occurred due to a loss of thermal stability of grain size caused by the dissolution of the fine β-phase particles into the matrix. Models that can explain the high-temperature flow behavior of the ultrafine grained AZ91 alloy were proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 677, 20 November 2016, Pages 332-339
Journal: Materials Science and Engineering: A - Volume 677, 20 November 2016, Pages 332-339
نویسندگان
Y.S. Kim, W.J. Kim,