Selaus tekijän mukaan kokoelmassa "Ullakko, Kari"Väitöskirjat
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Development of hybrid microdevices composed of Ni-Mn-Ga and silicon layers: fabrication and metrology
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 11.12.2023)Extensive research and development efforts have established Ni-Mn- Ga as a promising smart material. However, its practical applications as a sensing and actuating material still need to be improved. Several challenges ... -
Laser powder bed fusion for the manufacture of Ni-Mn-Ga magnetic shape memory alloy actuators
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 03.12.2021)The ability of the magnetic shape memory (MSM) alloy Ni-Mn-Ga to exhibit large magnetic-field-induced strain (MFIS) of 6-12% makes it a promising actuation material for small devices in which traditional mechanisms and ... -
New methods for controlling twin configurations and characterizing twin boundaries in 5M Ni-Mn-Ga for the development of applications
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 10.06.2015)Traditional methods for studying the magnetic shape memory (MSM) alloys Ni-Mn-Ga include subjecting the entire sample to a uniform magnetic field or completely actuating the sample mechanically. These methods have produced ... -
Ni-Mn-Ga magnetic shape memory alloy for precise high-speed actuation in micro-magneto-mechanical-systems
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 17.01.2019)Single crystalline Ni-Mn-Ga alloys are known for their large reversible magnetic-field-induced strain (MFIS) of several percent. This effect was discovered and named magnetic shape memory (MSM) by K. Ullakko in 1996. Since ... -
Twin boundary dynamics in magnetic shape memory alloy Ni-Mn-Ga five-layered modulated martensite
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 10.12.2018)Ni-Mn-Ga magnetic shape memory (MSM) alloys are considered to be highly promising materials for actuation, damping, sensing and energy harvesting applications, due to the unique combination of a large transformation strain ...
