کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4921452 | 1429343 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of crystal defects on the elastic properties of tungsten metals
ترجمه فارسی عنوان
تأثیر نقایص کریستال بر خصوصیات الاستیک فلزات تنگستن
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کلمات کلیدی
دینامیک مولکولی، تنگستن، قابلیت ارتجاعی، پلاستیک نقص کریستال،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
The four stretching process stages of the elastic, plastic, stalemate, and fracture were represented for the metal tungsten by using molecular dynamics method. The young's modulus, yield strain and yield stress were calculated. The microscopic mechanics of the stretching process is analyzed. The energy of FCC and HCP generated was higher than that of BCC, so that the energy of the system increased, and the stress level was lower in the plastic deformation stage. In the late stage of plastic deformation, the growth of the twin belt was of long range ordered periodic structure, which made the system stress change periodically. In the Stalemate Stage of deformation, the other disordered structure, setting in the HCP structure of the twin belt, growed to absorb energy and generate cavity under stress and makes the lattice fracture. The yield stress of metal tungsten decreases monotonically with temperature and vacancy. The effects of temperature and vacancy on the lattice fracture were discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volumes 109â111, Part A, 1 November 2016, Pages 321-325
Journal: Fusion Engineering and Design - Volumes 109â111, Part A, 1 November 2016, Pages 321-325
نویسندگان
Hongyan Chang, Zheng Huang, Shulong Wen, Ji ming Chen, Xiang Liu, Min Pan, Yong Zhao,