کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7978667 | 1514717 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural impact on the Hall-Petch relationship in an Al-5Mg alloy processed by high-pressure torsion
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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: Structural impact on the Hall-Petch relationship in an Al-5Mg alloy processed by high-pressure torsion Structural impact on the Hall-Petch relationship in an Al-5Mg alloy processed by high-pressure torsion](/preview/png/7978667.png)
چکیده انگلیسی
The evolution of microstructure and microhardness was studied in a commercial 5483 Al-5Mg alloy processed by high-pressure torsion (HPT) under a pressure of 6.0Â GPa up to 10 turns. Significant grain size refinement was observed even after 1/4 turn, and additional processing led to a further grain size reduction and a shift in the distribution of grain boundary misorientation angles towards higher values. An essentially fully homogeneous microstructure was reached after 10 turns with a final grain size of ~70Â nm, a saturation Vickers microhardness of Hvâ240 which was attained at and above equivalent strains of ~150, a relatively narrow grain size distribution and a fraction of ~80% of high-angle grain boundaries. Analysis shows the Hall-Petch plot deviates from the conventional linear relationship for samples processed through small numbers of turns, but after 3 or more turns there is a direct correlation between the results obtained in HPT processing and coarse-grained samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 626, 25 February 2015, Pages 9-15
Journal: Materials Science and Engineering: A - Volume 626, 25 February 2015, Pages 9-15
نویسندگان
Piotr Bazarnik, Yi Huang, Malgorzata Lewandowska, Terence G. Langdon,