کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1447312 988641 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Martensitic transformation in rapidly solidified Heusler Ni49Mn39Sn12 ribbons
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Martensitic transformation in rapidly solidified Heusler Ni49Mn39Sn12 ribbons
چکیده انگلیسی

In the present work, the microstructure evolution and kinetics of the martensitic transformation are investigated in as-spun and annealed ribbons of Heusler Ni49Mn39Sn12 using electron microscopy, X-ray diffraction and differential scanning calorimetry. Both ribbons undergo a reversible martensitic transformation during thermal cycling and the low-temperature martensite is confirmed to be a modulated four-layered orthorhombic (4O) structure through in situ cooling transmission electronic microscopy investigation. The annealing effect on the martensitic transformation behavior is discussed from the viewpoints of electron concentration, Mn–Mn interatomic distance, atomic order degree and grain size. A strong cooling-rate dependence of phase transition kinetics is found and the mechanism is analyzed. The satisfactory reproducibility obtained during thermal cycling test of this alloy ribbons offers great potential for practical applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 59, Issue 14, August 2011, Pages 5692–5699
نویسندگان
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