Temperature rise of high-frequency martensite reorientation via Type II twin boundary motion in NiMnGa Ferromagnetic Shape Memory Alloy. (15th July 2015)

• Record Type: Journal Article
• Authors: Pascan, O.-Z.; He, Y.J.; Moumni, Z.; Zhang, W.H.
• Is Part Of: Scripta materialia. Volume 104(2015)
• Page Start: 71
• Page End: 74
• Publication Date: 2015-07-15
• Subjects: Ferromagnetic Shape Memory Alloys -- Martensite twinning -- Internal friction -- Interface structure -- Dynamic phenomena; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.04.006
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : We measured the temperature rise of the high-frequency magnetic-field-induced martensite reorientation in Ni–Mn–Ga Ferromagnetic Shape Memory Alloy and observed the morphology of the associated twin boundaries. It was found that this temperature rise is mainly caused by low-friction Type II twin boundary motion, even though high-friction Type I twin boundary motion is dominant in quasi-static stress-induced martensite reorientation. A simple formula considering the frictional twin boundary motion and heat transfer is derived to describe this temperature rise.