کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786310 1465652 2011 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructural size effects on mechanical properties of high purity nickel
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Microstructural size effects on mechanical properties of high purity nickel
چکیده انگلیسی

The aim of this article is to provide experimental results in order to understand the microstructural size effects which occur with a decrease in the thickness of polycrystalline nickel samples from 3.2 mm to 12.5 μm. The influence of the thickness, grain size and ratio thickness to grain size on the mechanical properties and strain hardening were investigated by mechanical tests and TEM observations. The results show the presence of three different domains of mechanical behaviour: polycrystalline, multicrystalline and quasi-single crystalline depending on the thickness and on the number of grains across the thickness. The transition between the three domains is due to the occurrence of surface effects involving a decrease in the long-range internal backstress revealed by the TEM observations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 27, Issue 4, April 2011, Pages 635–654
نویسندگان
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