کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11032796 | 1645141 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quasi in-situ analysis of geometrically necessary dislocation density in α-fibre and γ-fibre during static recrystallization in cold-rolled low-carbon Ti-V bearing microalloyed steel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In the present study, cold-rolled low-carbon steel is annealed at three different conditions: 700â¯Â°C for 0â¯s, 800â¯Â°C for 0â¯s and 800â¯Â°C for 2â¯min at the heating rate of ~10â¯Â°C/s. Recrystallization behaviour on sample surface is studied using a heated stage Scanning Electron Microscopy and Electron Backscattered Diffraction. For the lower annealing temperature of 700â¯Â°C with no dwell, almost no recrystallization is observed and microstructure resembles the as-received deformed material with the exception of occasional sub-micron sized nuclei. For the annealing conditions of 800â¯Â°C 0â¯s and 800â¯Â°C 2â¯min, onset and evolution of recrystallization is observed in-situ as a function of the initial as-cold rolled texture. Slower recovery rate of alpha fibre than gamma fibre is observed and confirmed by lower drop in average geometrically necessary dislocation (GND) density for un-recrystallized alpha fibres (1.1E+14â¯mâ2 for 700â¯Â°C 0â¯s, 1.4E+14â¯mâ2 for 800â¯Â°C 0â¯s and 4.5E+14â¯mâ2 for 800â¯Â°C 2â¯min) than for un-recrystallized gamma fibre grains (3.0E+14â¯mâ2 for 700â¯Â°C 0â¯s, 6.2E+14â¯mâ2 for 800â¯Â°C 0â¯s and 9.8E+14â¯mâ2 for 800â¯Â°C 2â¯min) during annealing. Strong gamma texture in recrystallized matrix is found for annealing conditions of 800â¯Â°C 0â¯s and 800â¯Â°C 2â¯min. From TEM characterisation it was shown that sub-grain boundaries are decorated with fine precipitates (diameter dâ¯<â¯15â¯nm) of titaniumâvanadium carbides (Ti,V)C for the annealing condition of 700â¯Â°C 0â¯s, which suggests that these precipitates play a major overall role in retardation of the recrystallization kinetics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 145, November 2018, Pages 686-696
Journal: Materials Characterization - Volume 145, November 2018, Pages 686-696
نویسندگان
Ishwar Kapoor, Yongjun Lan, Arjan Rijkenberg, Zushu Li, Vit Janik,