Results 141 to 150 of about 4,302 (194)

Transformation of dislocations during twin variant reorientation in Ni–Mn–Ga martensite structures

Scripta Materialia, 2012
The transformation of perfect dislocation configurations during twin variant reorientation in Ni–Mn–Ga martensites was analyzed by means of the correspondence matrix method. It was found that the dislocations can change the length of the Burgers vectors remarkably, and hence increase the self-energy by several percent of their initial value.
Maciej J. Szczerba, Marek S. Szczerba
openaire   +2 more sources

Stabilisation of martensite due to shear deformation via variant reorientation in polycrystalline NiTi

Acta Materialia, 2000
The effect of deformation via martensite reorientation on the transformation behaviour of polycrystalline near-equiatomic NiTi was studied. Differential scanning calorimetry measurement showed that both the critical temperature and the endothermic heat of the first reverse transformation of the deformed martensite were increased as compared to an ...
Yinong Liu, D Favier
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Stress-induced martensite variant reorientation in magnetic shape memory Ni–Mn–Ga single crystal studied by neutron diffraction

Smart Materials and Structures, 2008
Stress-induced martensite variant reorientation in magnetic shape memory Ni?Mn?Ga single crystal was studied in?situ by the neutron diffraction technique. Principles of determination of individual tetragonal martensitic variants in shape memory alloys are explained.
P Molnar, P Sittner, P Lukas, S-P Hannula, O Heczko   +4 more
openaire   +2 more sources

Phenomenological modeling for magneto-mechanical couplings of martensitic variant reorientation in ferromagnetic shape memory alloys

Applied Physics A, 2022
Yuxiang Han, Linxiang Wang, Roderick Melnik   +2 more
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Investigation of the martensite variant reorientation of the single crystal Ni-Mn-Ga alloy via training processes and a modification with a silicone rubber

Materials Chemistry and Physics, 2023
Wan-Ting Chiu, Akihito Goto, Masaki Tahara, Tomonari Inamura, Hideki Hosoda   +4 more
openaire   +2 more sources

Magnetic field-induced martensitic variant reorientation in magnetic shape memory alloys

Philosophical Magazine, 2005
The magnetically induced martensitic variant reorientation process under applied mechanical load in magnetic shape memory alloys (MSMAs) is considered. Of particular interest is the associated nonlinear and hysteretic macroscopic strain response under variable applied magnetic field in the presence of stress, also known as the magnetic shape memory ...
B. Kiefer, D. C. Lagoudas
openaire   +1 more source

Crossing twin of Ni–Mn–Ga 7M martensite induced by thermo-mechanical treatment

, 2020
Thermo-mechanical treatment is an effective way to tune the microstructure and enhance the output strain of NiMn-based magnetic shape memory alloys through field driven variant reorientation or structural transformation.
Zongbin Li, Dong Li, Jiaxing Chen, Bo Yang, Naifu Zou, Yudong Zhang, C. Esling, Xiang Zhao, L. Zuo   +8 more
semanticscholar   +1 more source

Self-activated reversibility in the magnetically induced reorientation of martensitic variants in ferromagnetic Ni-Mn-Ga films

Physical Review B, 2010
Magnetically induced reorientation (MIR) of twin variants for [101]-oriented martensite has been studied for Ni-Mn-Ga thin films deposited on (001) YSZ substrates. The MIR effect displayed by these films is self-reversible, is characterized by a small increase in the magnetization, and shows a temperature-dependent activation field.
Yuepeng Zhang, R. A. Hughes, J. F. Britten, J. S. Preston, G. A. Botton, M. Niewczas   +5 more
openaire   +1 more source

Modeling of the magnetic field-induced martensitic variant reorientation and the associated magnetic shape memory effect in MSMAs

SPIE Proceedings, 2005
This work is concerned with the magnetic field-induced rearrangement of martensitic variants in magnetic shape memory alloys (MSMAs). In addition to the variant reorientation, the rotation of the magnetization and magnetic domain wall motion are considered as the microstructural mechanisms causing the macroscopically observable constitutive response ...
Bjorn Kiefer, Dimitris C. Lagoudas
openaire   +1 more source

Giant rubber-like behavior induced by martensite aging in Ni51Fe18Ga27Co4 single crystals

Scripta Materialia, 2019
Stress-induced martensite aging along the [110]B2||[100]L10-direction in compression was employed to enhance the functional properties of Ni51Fe18Ga27Co4 single crystals. Stress-induced martensite aging induces two effects.
E. Panchenko, E. Timofeeva, A. Eftifeeva, K. Osipovich, N. Surikov, Y. Chumlyakov, G. Gerstein, H. Maier   +7 more
semanticscholar   +1 more source