TY - GEN
T1 - Apparent poisson’s ratio for fe-ga alloy single crystal due to magnetostriction
AU - Fujita, Masaki
AU - Ikeuchi, Takehito
AU - Koyama, Akihiro
AU - Imafuku, Muneyuki
AU - Fujieda, Shun
AU - Suzuki, Shigeru
N1 - Funding Information:
This research was supported by MEXT/JSPS KAKENHI 17H03422.
Publisher Copyright:
© 2018 Trans Tech Publications, Switzerland.
PY - 2018
Y1 - 2018
N2 - Fe-Ga alloys are used for practical magnetostrictive materials. The understanding of mechanical properties under magnetic field is very important for their application to vibration power generation devices. Especially, Poisson’s ratio is one of key parameters because it is strongly related with the volume change of materials. In the study, we investigated actual behavior of Poisson’s ratio due to magnetostriction, instead of just the mechanical one. The sample was cube-oriented Fe-18mol%Ga single crystal disc. Static magnetic fields were applied in various directions parallel to (001). Strain values in various directions were measured by strain gauge and X-ray diffraction. And then, tri-axial strain analysis for single crystal was carried out. Theoretically, Poisson’s ratio due to magnetostriction is known to be 0.5, (volume conservative), value is close to the mechanical one, 0.45. On the other hand, we found that Poisson’s ratio exhibits anisotropic behavior despite the elastic constants are equivalent in [010] and [001]. This phenomenon is attributable to the magnetic domain structure under zero magnetic field. In this presentation, we will discuss this apparent Poisson’s ratio considering the volume strain and magnetostriction comprehensively.
AB - Fe-Ga alloys are used for practical magnetostrictive materials. The understanding of mechanical properties under magnetic field is very important for their application to vibration power generation devices. Especially, Poisson’s ratio is one of key parameters because it is strongly related with the volume change of materials. In the study, we investigated actual behavior of Poisson’s ratio due to magnetostriction, instead of just the mechanical one. The sample was cube-oriented Fe-18mol%Ga single crystal disc. Static magnetic fields were applied in various directions parallel to (001). Strain values in various directions were measured by strain gauge and X-ray diffraction. And then, tri-axial strain analysis for single crystal was carried out. Theoretically, Poisson’s ratio due to magnetostriction is known to be 0.5, (volume conservative), value is close to the mechanical one, 0.45. On the other hand, we found that Poisson’s ratio exhibits anisotropic behavior despite the elastic constants are equivalent in [010] and [001]. This phenomenon is attributable to the magnetic domain structure under zero magnetic field. In this presentation, we will discuss this apparent Poisson’s ratio considering the volume strain and magnetostriction comprehensively.
KW - Fe-Ga alloy
KW - Magnetostriction
KW - Poisson’s ratio
KW - Volume strain
KW - X-ray diffraction method
UR - http://www.scopus.com/inward/record.url?scp=85064092204&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85064092204&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.941.879
DO - 10.4028/www.scientific.net/MSF.941.879
M3 - Conference contribution
AN - SCOPUS:85064092204
SN - 9783035712087
T3 - Materials Science Forum
SP - 879
EP - 883
BT - THERMEC 2018
A2 - Shabadi, R.
A2 - Ionescu, Mihail
A2 - Jeandin, M.
A2 - Richard, C.
A2 - Chandra, Tara
PB - Trans Tech Publications Ltd
T2 - 10th International Conference on Processing and Manufacturing of Advanced Materials, 2018
Y2 - 9 July 2018 through 13 July 2018
ER -