کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
803779 | 1467816 | 2011 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and mechanical properties of low-carbon ferrite-pearlite steel after severe plastic deformation and subsequent high-temperature annealing
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In the work, we studied the structure and mechanical properties of low-carbon ferrite-pearlite steel (Fe-l.12Mn-0.08V-0.07Ti-0.1C, wt %) after severe plastic deformation and subsequent high-temperature annealing. The ferrite-pearlite steel was subjected to equal-channel angular pressing at T = 200 °C (Bc mode, 4 passes) and to high-pressure torsion at room temperature (5 revolutions at 6 GPa). It is shown that severe plastic deformation under these conditions gives rise to fragmented structures with an average fragment size of 260 nm after equal-channel angular pressing and 90 nm after high-pressure torsion. Quasi-hydrostatic pressure increases the steel microhardness to 6.4 GPa, which is much higher than the steel microhardness in the initial state and after equal-channel angular pressing (1.6 and 2.9 GPa, respectively). The formed structures feature high thermal stability: up to 400 °C after high-pressure torsion and up to 500 °C after equal-channel angular pressing. The contributions of dispersion and substractural hardening to the high strength properties of Fe-Mn-V-Ti-C steel under severe plastic deformation and to the high thermal stability of its submicro- and nanocrystalline structures in high-temperature annealing are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physical Mesomechanics - Volume 14, Issues 3â4, MayâAugust 2011, Pages 195-203
Journal: Physical Mesomechanics - Volume 14, Issues 3â4, MayâAugust 2011, Pages 195-203
نویسندگان
E.G. Astafurova, G.G. Zakharova, E.V. Naydenkin, G.I. Raab, S.V. Dobatkin,