کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990096 | 1516126 | 2018 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Constituent constraining effects on the microstructural evolution, ductility, and fracture mode of crystalline/amorphous nanolaminates
ترجمه فارسی عنوان
اثرات محدود کننده ساختاری بر تکامل میکرو سازه، چابکی و حالت شکستگی نانومقیقات بلوری / آمورف
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کلمات کلیدی
نانولایلهای بلوری / آمورف، بلورسازی، شکل پذیری، محدودیت اثر، حالت شکستگی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
چکیده انگلیسی
Manipulation of the microstructural evolution to achieve controllable deformation and fracture behaviors in crystalline/amorphous nanolaminates is a grand challenge from the perspective of constraining effects of a crystalline on an amorphous phase. In this work, crystalline/amorphous Ag/Cu-Zr and Mo/Cu-Zr nanolaminates were respectively prepared by using magnetron sputtering. The microstructural evolution, tensile ductility, and fracture mode were investigated within a wide range of modulation ratio η (the thickness ratio of amorphous to crystalline layer) from 0.1 to 9.0. The Ag/Cu-Zr nanolaminates showed the tensile ductility firstly decreased and subsequently increased with raising η, leaving a minimum value at the critical η* of â¼1.0. The fracture mode was accordingly transformed from shearing to opening. However, the Mo/Cu-Zr nanolaminates exhibited a different η-dependence where the tensile ductility monotonically increased with η, with fracture mode unchanged as opening. The strong constituent effect on the deformation and fracture of crystalline/amorphous nanolaminates was rationalized in light of the deformation-induced devitrification behaviors in the amorphous layers, which was tuned by the constituent-dependent elastic modulus mismatch and the amorphous layer thickness. Furthermore, the devitrification behaviors were qualitatively interpreted in terms of the image force between constituents and the stress field of a dislocation. These findings manifest a microstructural design by controlled constituents to achieve enhanced mechanical properties in the crystalline/amorphous nanolaminates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 768, 5 November 2018, Pages 88-96
Journal: Journal of Alloys and Compounds - Volume 768, 5 November 2018, Pages 88-96
نویسندگان
Yaqiang Wang, Daniel Kiener, Xiaoqing Liang, Jianjun Bian, Kai Wu, Jinyu Zhang, Gang Liu, Jun Sun,