کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1584945 1514908 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magneto-mechanical evaluation for twinning plane movement driven by magnetic field in ferromagnetic shape memory alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Magneto-mechanical evaluation for twinning plane movement driven by magnetic field in ferromagnetic shape memory alloys
چکیده انگلیسی

Rearrangement of martensite variants under magnetic field has been investigated by using single crystals of three ferromagnetic shape memory alloys: a disordered Fe–31.2 at.% Pd alloy, an ordered (degree of order ∼0.8) Fe3Pt, and stoichiometric Ni2MnGa. Each alloy transforms from a cubic parent phase to a tetragonal or pseudotetragonal martensite phase whose tetragonality is about 0.94 at low temperatures. We evaluated the magnetic shear stress τmag acting across the twinning plane under magnetic field, by using magnetic anisotropy constant and twinning shear, and compared it with the shear stress required for the rearrangement τreq, which is obtained from tensile or compressive tests. As a result, we confirmed that τmag is larger than τreq when the rearrangement of variants occurs by magnetic field and vice versa regardless of temperature and field direction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 438–440, 25 November 2006, Pages 12–17
نویسندگان
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