کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448168 988666 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the superposition of flow stress contributions at finite temperatures and in the athermal limit
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
On the superposition of flow stress contributions at finite temperatures and in the athermal limit
چکیده انگلیسی

The functional form of the equation describing the superposition of contributions to the flow stress due to various strengthening mechanisms is analyzed. Considering that the superposition can be written as a sum to which each mechanism contributes through function f, that the dependence of the critical resolved shear stress on the density of obstacles to dislocation motion is given by function g, and that f and g have the same functional form for all strengthening mechanisms considered, it is shown that these two function are necessarily power functions, and their exponents are related. Furthermore, requiring that the superposition law is valid both at finite temperatures and at 0 K leads to an equivalent expression for the strain rate sensitivity and imposes restrictions on the way in which contributions of various mechanisms to the flow stress are evaluated at finite temperatures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 58, Issue 16, September 2010, Pages 5443–5446
نویسندگان
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