کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448193 988667 2009 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of the Zener–Hollomon parameter on the microstructures and mechanical properties of Cu subjected to plastic deformation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of the Zener–Hollomon parameter on the microstructures and mechanical properties of Cu subjected to plastic deformation
چکیده انگلیسی

Pure Cu was deformed at different strain rates and temperatures, i.e. with different Zener–Hollomon parameters (Z) ranging within ln Z = 22–66, to investigate the effect of Z on its microstructures and mechanical properties. It was found that deformation twinning occurs when ln Z exceeds 30, and the number of twins increases at higher Z. The average twin/matrix lamellar thickness is independent of Z, being around 50 nm. Deformation-induced grain refinement is enhanced at higher Z, and the mean transverse grain size drops from 320 to 66 nm when ln Z increases from 22 to 66. The grain refinement is dominated by dislocation activities in low-Z processes, while deformation twinning plays a dominant role in high-Z deformation. An obvious increment in yield strength from 390 to 610 MPa was found in deformed Cu with increasing Z, owing to the significant grain refinement as well as the strengthening from nanoscale deformation twins.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 57, Issue 3, February 2009, Pages 761–772
نویسندگان
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