Kinetics of aging of the Cu-Be alloy with different beryllium concentrations in an external constant magnetic field

Abstract

The data are reported on the microhardness and small angle neutron scattering of samples from specially melted copper-berillium alloys (the Be concentrations are 0.5, 1.0, and 1.6 wt %; the rest is Cu) aged at a temperature of ~580 K in the dc magnetic fields ~5.3 and 7.0 kOe and with no field. It has been established that magnetic field substantially influences the kinetics of phase formation during aging.

Effect of Annealing in Magnetic Field on Ferromagnetic Nanoparticle Formation in Cu-Al-Mn Alloy with Induced Martensite Transformation

“…The radius of a critical nucleus of a new phase, which can be defined using a standard procedure of free energy minimization relative to the radius of new phase nucleus, is as follows [ 21 ]: …”

“…where γ s is a surface energy of the system, g v is a specific change in thermodynamic potential of precipitated phase relative to the matrix, е v is a specific elastic energy, I is a magnetization of a new phase, and B is an induction of magnetic field. So, the energy of formation of a new phase critical nucleus, in turn, can be expressed by a formula [ 21 ]: …”

Research Progress of Magnetic Field Regulated Mechanical Property of Solid Metal Materials

“…The changes of microhardness of the alloy was mainly due to the magnetic field affecting the number and distribution of θ phase precipitation. Diamagnetic beryllium bronze alloy, which had been solid solution treatment, was aged in the constant magnetic field of 0.7 T [16][17][18][19], and its microhardness changes are shown in Figure 2. It can be found that the microhardness of beryllium bronze alloy decreases basically (in Figure 2a-c), and the microhardness of Cu-1.6Be alloy decreases by 25.0% at most after magnetic field treatment.…”

A study on the room-temperature magnetoplastic effect of silicon and its mechanism

“…Magnetoplastic effects firstly reported in 1987 [1] originally referred to the phenomena that a magnetic field affects the dislocation-controlled plasticity of solids including ionic [1][2][3][4][5][6][7][8], covalent [6,[9][10][11][12][13][14][15][16][17][18][19][20] and metallic [3,4,[21][22][23][24][25][26] crystals. With the deepening of the relevant researches, a variety of effects of magnetic field on the microstructures [27][28][29][30][31][32][33][34][35][36] and properties [34,[36][37][38][39][40][41][42][43]…”