کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1576482 1514782 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of V on phase formation and plasticity improvement in Cu–Zr–Al glassy alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effects of V on phase formation and plasticity improvement in Cu–Zr–Al glassy alloys
چکیده انگلیسی

Vanadium was alloyed to an amorphous Cu–Zr–Al alloy to induce B2-CuZr phase formation in order to improve plasticity. The vanadium addition was based on the fact that it has a positive heat of mixing with the major constituents in the Cu–Zr–Al alloy, thus could cause liquid phase separation. Microstructural examination showed that V was dissolved in the amorphous matrix and promoted the formation of B2-CuZr precipitates in (Cu47.5Zr47.5Al5)99V1, improving the plasticity by doubling the fracture strain to 9.4%. However, when V content is more than 3 at%, brittle intermetallic compound phases (V+Al23V4) form and degrade the plasticity. The role of vanadium on plasticity improvement was discussed in the frame of shear band multiplication, energy dissipation during shear banding, twinning/phase-transformation of the B2-CuZr particles during deformation, and deformation induced B2-CuZr particle coarsening. An energy-balance analysis based on deformation-induced B2 particle coarsening produced an interfacial energy of 0.293 J/m2 for the B2 particle–glassy matrix interface. The result appears to indirectly support the previous idea that plasticity in Cu47.5Zr47.5Al5 is caused by dynamic coarsening of the B2-CuZr particles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 561, 20 January 2013, Pages 245–251
نویسندگان
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