کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5456720 1514657 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decoding flow unit evolution upon annealing from fracture morphology in metallic glasses
ترجمه فارسی عنوان
تکرار تکامل جریان انحراف پس از انحلال از مورفولوژی شکستگی در عینک های فلزی
کلمات کلیدی
واحد جریان، آرام سازی ساختاری، تکامل مورفولوژی شکستگی، منطقه تحول برش، ناحیه پلاستیکی نوک کراک، عینک های فلزی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The intrinsic correlation between the fracture morphology evolution and the structural heterogeneity of flow units in a typical Zr52.5Ti5Cu17.9Ni14.6Al10 (vit105) metallic glass (MG) upon annealing was investigated. By systematically tuning the annealing time at temperature below the glass transition temperature, a series of dimple-like fracture morphology were obtained, which is the unique fingerprint-like pattern for every annealing state. Based on the structural relaxation model of flow units, the evolution of the typical dimple sizes, the largest and smallest dimple size, with annealing were well fitted. Then the evolution of flow unit density was estimated from the fracture morphology evolution, which displays the same evolution trend with that measured from thermal relaxation. A stochastic dynamic model considering the interaction of activated flow units was proposed to analyze the effect of the initial flow unit density and the flow unit interaction intensity on the dynamic evolution of dimple distribution. Our work may provide a novel scheme to investigate the structural fingerprint information on flow units from fracture morphology, and enlighten the microscopic structural origin of the ductile-to-brittle transition during structural relaxation in MGs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 686, 16 February 2017, Pages 65-72
نویسندگان
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