Pulsed magnetic field-induced single twin boundary motion in Ni–Mn–Ga 5M martensite: A laser vibrometry characterization

Pulsed magnetic field-induced motion of single twin boundaries in Ni–Mn–Ga 5M martensite has been studied using laser vibrometry technique. Maximum actuation velocities of 0.25m/s for Type I and 2m/s for Type II twin boundary motion were directly observed, which corresponds to velocities of 4.2m/s a...

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Bibliographic Details
Published inScripta materialia Vol. 113; pp. 154 - 157
Main Authors Saren, A., Musiienko, D., Smith, A.R., Ullakko, K.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.03.2016
Subjects
Actuation
Boundaries
Constraining
Ferromagnetic shape memory alloy
Inertia
Lasers
Magnetic shape memory
Martensite
Nickel
Ni–Mn–Ga
Twin boundaries
Twin boundary
Twinning
Magnetic shape memory
Ferromagnetic shape memory alloy
Twinning
Twin boundary
Ni–Mn–Ga
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Summary:Pulsed magnetic field-induced motion of single twin boundaries in Ni–Mn–Ga 5M martensite has been studied using laser vibrometry technique. Maximum actuation velocities of 0.25m/s for Type I and 2m/s for Type II twin boundary motion were directly observed, which corresponds to velocities of 4.2m/s and 33m/s for these types of twin boundaries moving inside the crystal. Actuation response time of 2μs and actuating acceleration of about 2×105m/s2 for Type II boundary were achieved. The difference between Type I and Type II boundaries and the limiting role of inertia in twin boundary motion are discussed. [Display omitted]
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2015.10.020