کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8943377 1645144 2019 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanisms on the outstanding high temperature plasticity of AlNp/Al-0.4Cu composites induced by cryogenic treatment
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Mechanisms on the outstanding high temperature plasticity of AlNp/Al-0.4Cu composites induced by cryogenic treatment
چکیده انگلیسی
The 8.2AlNp/Al-0.4Cu composites were solution treated by heating to 530 °C for 1 h and then quenched in water and liquid nitrogen, respectively. After quenching in liquid nitrogen, the composites possess nearly the same ultimate tensile strength (UTS) but a significant increase in elongation by 79% (at 350 °C) compared with that of the samples quenched in water. The impact of different quenching process on the microstructure evolution and high temperature tensile properties has been investigated systematically. After quenched in water, there are 69% low-angle grain boundaries (LAGBs), high point defect concentration and a small quantity of dislocations. This microstructure leads to the dynamic recrystallization as well as discordant deformation. The high percentage of high-angle grain boundaries (HAGBs), high dislocation density and low point defect concentration of the composites (quenched in liquid nitrogen) help improve the microstructural stability and contribute to the favorable elongation at 350 °C. The mechanisms revealed in this work may provide a paramount method to achieve a superior combination of strength and elongation for heat resistant Al alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 770, 5 January 2019, Pages 755-764
نویسندگان
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