Ductility enhancement and magnetostriction of polycrystalline Fe–Ga based alloys

Influences of rare earth element Ce-doping and melt-spinning on microstructure and magnetostriction of Fe83Ga17 alloy

“…The polycrystalline Fe-Ga alloy is more advantageous in cost and preparation, compared with the single crystal Fe-Ga alloy. But now the magnetostriction coefficient of polycrystalline Fe-Ga alloy is quite small (80 ~ 100 ppm) [7][8][9][10]. Therefore, most of investigations related to polycrystalline Fe-Ga alloys focused on how to enhance the magnetostriction coefficient of alloy.…”

Effect of Al substitution for Ga on the mechanical properties of directional solidified Fe-Ga alloys

“…The unique combination of magnetostrictive and mechanical properties in Fe-Ga alloys makes them attractive for sensors, actuators and transducers applications. Although single crystal Fe-Ga alloys are quite tough, polycrystalline Fe-Ga alloys can suffer from intergranular fracture due to weak grain boundaries [5][6][7]. Recently, studies on Fe-Ga alloys have shown that addition of small amounts of alloying elements leads to improvement of grain boundary strength and then enhancement in the mechanical strength and ductility [8][9][10][11][12].…”

“…Furthermore, alloying addition of Cr has been shown an effective alloying element to improve the ductility of Fe-Ga alloys [6].…”

Internal friction, dilatometric and calorimetric study of anelasticity in Fe–13at.% Ga and Fe–8at.% Al–3at.% Ga alloys

“…The Fe-Ga alloys, 'Galfenol', have low ductility [1] caused by ordering of Ga atoms in bcc iron (B2, D0 3 , D0 19 and L1 2 ), where the type of order depends on temperature and concentration of Ga atoms in iron [2,3]. Fe-Ga alloys with Ga < 20 at.% are also known by their high damping capacity [4] due to high values of magnetostriction [5], which are typical for soft-magnetic materials with positive anisotropy energy [6].…”