کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5347558 1503549 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evolution of stacking fault tetrahedral and work hardening effect in copper single crystals
ترجمه فارسی عنوان
تکامل گسل چهارگوشه و کار سخت شدن کار در کریستال های مس
کلمات کلیدی
تقسیم گسل چهارگوشه ای، شبیه سازی دینامیک مولکولی، نانو ماشینکاری کریستال مسی، سخت شدن کار،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
Stacking fault tetrahedral (SFT), generated in machining of copper single crystal as one type of subsurface defects, has significant influence on the performance of workpiece. In this study, molecular dynamics (MD) simulation is used to investigate the evolution of stacking fault tetrahedral in nano-cutting of copper single crystal. The result shows that SFT is nucleated at the intersection of differently oriented stacking fault (SF) planes and SFT evolves from the preform only containing incomplete surfaces into a solid defect. The evolution of SFT contains several stress fluctuations until the complete formation. Nano-indentation simulation is then employed on the machined workpiece from nano-cutting, through which the interaction between SFT and later-formed dislocations in subsurface is studied. In the meanwhile, force-depth curves obtained from nano-indentation on pristine and machined workpieces are compared to analyze the mechanical properties. By simulation of nano-cutting and nano-indentation, it is verified that SFT is a reason of the work hardening effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 422, 15 November 2017, Pages 413-419
نویسندگان
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