کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973191 | 1514625 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Discontinuous dynamic recrystallization in α-Zr
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
This study attempts to identify the type of dynamic recrystallization (DRX) occurring in hot deformed zirconium. For this, samples of Zr were uniaxially compressed at 800â¯Â°C and 0.1â¯sâ1 to varying strains. Microstructural characterization was done using electron back scatter diffraction (EBSD). The flow stress showed an initial hardening followed by softening to a steady state value. DRX grains were identified as those with a grain orientation spread of less than 2°. Fine recrystallized grains were observed along grain boundaries at low to intermediate strains (0.15 and 0.6). The grain size decreased with increasing strain up to a strain of 0.6, beyond which it showed no further decrease. The degree of misorientation of boundaries was used to distinguish between discontinuous and continuous dynamic recrystallization (dDRX and cDRX, respectively). Most recrystallized grains had their boundaries of very high misorientation (> 50°) suggesting that dDRX was prevalent. The evidence of cDRX was weak, although it cannot be ruled out at higher strains. It was concluded that Zr undergoes dDRX when deformed at 800â¯Â°C and 0.1â¯sâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 718, 7 March 2018, Pages 104-110
Journal: Materials Science and Engineering: A - Volume 718, 7 March 2018, Pages 104-110
نویسندگان
Rajeev Kapoor, G. Bharat Reddy, Apu Sarkar,