title: Unidirectional solidification of magnetostrictive materials using a magnetic field in microgravity.
abstract: Unidirectional solidification experiments of magnetostrictive materials of Tb(0.3)Dy(0.7)Fe(2-x), (Terfenol-D) alloy in a static magnetic field and microgravity were performed using the Japan Microgravity Center (JAMIC) free-fall facilities. When the magnetic field strength was increased from 0T to 3.7 x 10(-2) T during unidirectional solidification in microgravity, a <111> crystallographic alignment of the grains dominated, and the maximum magnetostriction constant increased from 500 ppm to 2,000ppm. For unidirectional solidification in normal gravity, the maximum magnetostriction constant remained at 1,000 ppm for increases in the magnetic field.
authors.affiliation: Microgravity Materials Laboratory, National Institute of Advanced Industrial Science and Technology, Tsukisamu-Higashi, Toyohira-ku, Sapporo, Japan. h-minagawa@aist.go.jp
authors.forename: Hideki
authors.initials: H
authors.lastname: Minagawa
authors.forename: Keiji
authors.initials: K
authors.lastname: Kamada
authors.forename: Hideaki
authors.initials: H
authors.lastname: Nagai
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nakata
authors.forename: Takeshi
authors.initials: T
authors.lastname: Okutani