کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11580870 | 1362947 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Hf additions on phase stability and mechanical properties of binary W-Hf alloys: A first-principles study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of Hf additions on phase stability and mechanical properties of binary W-Hf alloys: A first-principles study Effect of Hf additions on phase stability and mechanical properties of binary W-Hf alloys: A first-principles study](/preview/png/11580870.png)
چکیده انگلیسی
In this paper, the effect of hafnium alloying element on phase stability and mechanical properties of binary tungsten-hafnium alloys was calculated using the first principles technology. Firstly, we investigated the cell volumes, lattice constants and formation energies of binary W1-xHfx (xâ=â0, 0.0625, 0.125, 0.1875, 0.25 and 0.5) alloys. It is shown that binary tungsten-hafnium alloys remain maintain BCC structures. When the concentration of hafnium atoms is lower than 12.5%, the structures of binary tungsten-hafnium alloys are thermodynamically stable. The elastic constants of binary tungsten-hafnium alloys were calculated based on the optimized atomic lattice. Then the elastic modulus and other mechanical parameters are deduced according to the relevant formulas. It is shown that the mechanical strength of binary tungsten-hafnium alloy decreases with increasing hafnium concentration, which is lower than the mechanical strength of pure tungsten metal. However, the mechanical strength of binary tungsten-hafnium alloys is higher than that of pure hafnium metal. In addition, it can be effective to improve the ductility of pure tungsten metal based on hafnium alloying tungsten.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volume 137, December 2018, Pages 295-302
Journal: Fusion Engineering and Design - Volume 137, December 2018, Pages 295-302
نویسندگان
Diyou Jiang, Tao Wang, Xiaohua Huang, Xiongzhi Zou, Jianfeng Hu,