کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1581428 1514860 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the ductility of a surface severely plastically deformed nickel alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
On the ductility of a surface severely plastically deformed nickel alloy
چکیده انگلیسی

The tensile ductility of a Ni-base, single-phase, face-centered-cubic alloy decreases after surface severe plastic deformation (S2PD). The mechanism responsible for the reduced tensile ductility has been investigated via systematic experiments in conjunction with finite element modeling. The measured ductility parameters (i.e., the elongation, uniform true strain, and reduction of area), strain-hardening coefficient of the true stress–strain relation, and fracture surface observation have been elucidated based on the alternation of the microstructure and stress states induced by S2PD. It is found that the reduced ductility is not due to the increased surface roughness and the presence of macroscopic residual stresses. Instead, it is induced by the presence of the work-hardened surface region and the formation of a nanocrystalline surface layer in S2PD-processed samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 498, Issues 1–2, 20 December 2008, Pages 216–224
نویسندگان
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