کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5455525 1514642 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced tensile ductility and strength of electrodeposited ultrafine-grained nickel with a desired bimodal microstructure
ترجمه فارسی عنوان
استحکام کششی و مقاومت الکترود نیکل دانه بندی شده با میکروارگانیسم مطلوب
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی

This work aims to use surfactant-assisted direct current electrodeposition technique to prepare four types of bimodal nickel, under different current densities. Bimodal Ni is obtained with different grain size and spatial distribution of CG and UFG areas showing a big disparity in mechanical properties. As a result of small population of coarse-grained surrounded by quite a lot of ultrafine-grained forming a unique shell-and-core bimodal structure, bimodal one present the best comprehensive mechanical properties with an ultrahigh tensile strength (~847 MPa) and a considerable plastic strain (~16.7%). Deformation initial, bimodal structures display more positive strain hardening to meaningful strains than unimodal structure of UFG and CG. Particularly bimodal one work-hardening rate is the highest thanks to its structure (UFG occupy 76.7% in total number fraction) and the distribution of growth twins. Growth twins in this article are referred to Σ3(111) coherent twins playing an important role in improving high strength, enhancing uniform plastic deformation ability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 701, 31 July 2017, Pages 196-202
نویسندگان
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