کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1571153 1514406 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and texture evolution of Cu–Nb composite wires
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Microstructure and texture evolution of Cu–Nb composite wires
چکیده انگلیسی


• Microstructure and texture evolution were studied systematically by EBSD.
• In Nb, grain boundaries of 20°–50° have a rotate/tile axis around <110>//DD.
• The rotation axes of above 50° boundaries are concentrated around <111> ⊥ DD in Nb.
• Curling is related to not only deformation mode of BCC but also Cu–Nb interface.

The evolution of microstructure and texture in Cu–Nb composite wires fabricated by an accumulative drawing and bundling process was investigated by backscattered electron (BSE), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Results indicate the onset of severe curling and shape changing occurred at the size of Nb ~ 400 nm with a surface increase of about 6.91 μm2/μm3 (the area per unit volume). Two kinds of grain boundaries in Nb are suggested: one is 20°–50° boundary with a rotate/tilt axis around <110> parallel to drawing direction (DD), and another is > 50° boundary with the axis perpendicular to DD. The curling phenomenon occurred at the Cu–Nb interface and is related not only to the deformation mechanism of Nb but also to the presence of interface. This result is distinct from reported works showing that curling takes place when BCC metals are heavily drawn (Area reduction > 73%). The variation in microstructure and texture evolution between Cu and Nb filaments was discussed based on the differences in deformation mechanisms of these two metals.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 81, July 2013, Pages 124–133
نویسندگان
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