کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5458366 | 1516169 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strengthening and toughening behaviors of a Mg-9Al alloy containing oxygen atoms
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Oxygen atoms are dispersed in a Mg-9Al alloy (Mg-O-9Al alloy) with the decomposition of TiO2 nanoparticles in melt. During the solidification process, the oxygen atoms are redistributed, affecting the development of the fine eutectic β-phase containing a higher concentration of oxygen atoms than that α-Mg since they have a limited solubility in α-Mg and assist the nucleation of α-Mg. The dissolved oxygen atoms expand the lattice structures of both α-Mg and β-phase, inducing the reduced lattice mismatch between α-Mg and β-phase. Therefore, yield stress of the Mg-O-9Al alloy is 143 MPa, much higher than 110 MPa observed in the Mg-9Al alloy. Fracture toughness values of 10.39 MPa m1/2 and 12.86 MPa m1/2 for both the Mg-9Al and Mg-O-9Al alloys are also respectively obtained. The fracture surface reveals that the crack propagates along the weak interface of β-phase in the Mg-9Al alloy. On the other hand, the β-phase disturbs the crack propagation route in the Mg-O-9Al alloy, showing many broken β-phases. Therefore, the improved interfacial feature with an addition of dissolved oxygen atoms in the Mg-O-9Al alloy results in enhanced mechanical properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 725, 25 November 2017, Pages 441-448
Journal: Journal of Alloys and Compounds - Volume 725, 25 November 2017, Pages 441-448
نویسندگان
S.W. Kang, H. Kang, D.H. Bae,