Scripta Materialia · 2019 · 27 citations · 33 references
Natural SciencesMaterials EngineeringMaterials ScienceCrystal StructureMechanical Behavior Of MaterialsMetallurgyAlloysCurie TemperatureMartensitic TransformationsMetalsStrain EngineeringStrain HardeningCrystal TwinningReciprocal Lattice DirectionsTwin BoundariesTwin Boundary MotionTwinned MartensiteTwinningTwinning AnalysisTwinning Deformation
We report on low twinning stress of 0.2 MPa for type 1 twin boundaries with rational (101) twinning plane and 0.1 MPa for type 2 twin boundaries with rational [1¯01] twinning direction, in Ni2MnGa0.8Fe0.2 seven-layer modulated martensite exhibiting about 12% stress-induced strain. The studied samples were free of compound twins with (100) and (110) twinning planes. The martensite lattice is monoclinic and shows a long-period commensurate modulation with wave vector q=(2/7)g110, where g110 is the reciprocal lattice vector. The investigated alloy has high potential for practical applications due to the low twinning stress and the elevated Curie point TC=400 K.
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J. W. Christian, S. Mahajan · Progress in Materials Science · 1995 · 3.5K citations
Crystal structure of martensitic phases in Ni–Mn–Ga shape memory alloys
J. Pons, V. A. Chernenko, R. Santamarta et al. · Acta Materialia · 2000 · 630 citations
Natural Sciences, Materials Engineering, Materials Science +14