کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7174914 | 1465594 | 2016 | 50 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Binary dislocation junction formation and strength in hexagonal close-packed crystals
ترجمه فارسی عنوان
شکل و قدرت اتصال جابجایی دودویی در بلورهای شش ضلعی بسته شده
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
This work examines binary dislocation interactions, junction formation and junction strengths in hexagonal close-packed (hcp) crystals. Through a line-tension model and dislocation dynamics (DD) simulations, the interaction and dissociation of different sets of binary junctions are investigated involving one dislocation on the (011¯0) prismatic plane and a second dislocation on one of the following planes: (0001) basal, (11¯00) prismatic, (11¯01) primary pyramidal, or (2¯112) secondary pyramidal. Varying pairs of Burgers vectors are chosen from among the common types: the basal type :13<112¯0>, prismatic type :<0001>, and pyramidal type :13<112¯3¯>. For binary interaction due to dislocation intersection, both the analytical results and DD-simulations indicate a relationship between symmetry of interaction maps and the relative magnitude of the Burgers vectors that constitute the junction. Using analytical formulae, a simple regressive model is also developed to represent the junction yield surface. The equation is treated as a degenerated super elliptical equation to quantify the aspect ratio and tilting angle. The results provide analytical insights on binary dislocation interactions that may occur in general hcp metals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 79, April 2016, Pages 176-195
Journal: International Journal of Plasticity - Volume 79, April 2016, Pages 176-195
نویسندگان
Chi-Chin Wu, Sylvie Aubry, Athanasios Arsenlis, Peter W. Chung,