کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5451520 1513712 2017 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties at elevated temperature of Mg-Al-Ni alloys prepared through powder metallurgy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد شیمی مواد
پیش نمایش صفحه اول مقاله
Microstructure and mechanical properties at elevated temperature of Mg-Al-Ni alloys prepared through powder metallurgy
چکیده انگلیسی
Mg-Al-Ni alloys were prepared by powder metallurgy, and their microstructure and elevated temperature mechanical properties were investigated. Results indicate that, in addition to α-Mg matrix, both coarse Al3Ni2 particles and fine AlNi nano-particles exist in the Mg-Al-Ni alloys. The strength at 150 °C is improved with the increase in Ni content. Mg-18.3Al-8Ni alloy possesses a compressive strength of 234.7 MPa and a yield strength of 146.5 MPa. Plasticity is also improved with a low concentration of Ni. Mg-11.3Al-2Ni alloy possesses a compression ratio of 17.3%. The phases of Al3Ni2 and AlNi in the alloys block the movements of grain boundaries and dislocations during the deformation at elevated temperature. The existence of AlNi phase provides a non-basal slip system, leading to the improvement in plasticity. Finally, the formation mechanism of Al-Ni phases in the process is discussed with thermodynamics and kinetics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 33, Issue 9, September 2017, Pages 947-953
نویسندگان
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