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

Abstract

During the material preparation process, the magnetic field can act with high intensity energy on the material without contact and affect its microstructure and properties. This non-contact processing method, which can change the microstructure and properties of material without affecting the shape and size of products, has become an important technical means to develop new materials and optimize the properties of materials. It has been widely used in scientific research and industrial production. In recent years, the magnetic field assisted processing of difficult-to-deform materials or improving the performance of complex and precision parts has been rapidly and widely concerned by scholars at home and abroad. This paper reviews the research progress of magnetic field regulating the microstructure, and properties of solid metal materials. The effects of magnetic field-assisted heat treatment, magnetic field assisted stretching, and magnetic field independent treatment on the microstructure and properties of solid metal materials are introduced. The mechanism of the magnetic field effect on the properties of metal materials is summarized, and future research on the magnetic field effect on solid metal has been prospected.

Effect of Pulsed Magnetic Field on the Microstructure of QAl9-4 Aluminium Bronze and Its Mechanism

“…According to the above theory, it can be inferred that the dislocation in the aluminium bronze alloy becomes more easily depinned and moved under the influence of the original stress field, due to the change in the electronic energy state at the pinned place during the pulsed magnetic field treatment. On the one hand, the dislocation movement reduced the stress concentration caused by the dislocation pile-up, relaxed the original stress, and reduced the residual stress of the alloy, as verified by the significant reduction in residual stress in the magnetic field treatment of aluminium alloy [ 7 ], nickel–aluminium bronze [ 9 ], EN8 special steel [ 10 ], titanium alloy [ 26 ], and magnesium alloy [ 27 ]. On the other hand, the dislocation movement somewhat altered the grain boundary angle, resulting in an apparent reduction in LAGBs and the disappearance of twin boundaries, which lowered the system energy.…”

“…Researchers have tried to directly put metal materials in a strong magnetic field to study the impact of magnetic field treatment on material structure and properties. It was found that magnetic field treatment had apparent effects on improving the strength, plasticity, hardness, wear resistance, fatigue resistance, and many other properties of metal materials [ 7 ]. Reference [ 8 ] observed that after constant magnetic field treatment of 7055 aluminium alloy, the cellular dislocation transformed to network dislocation to form a subcrystal, which positively affected grain refinement, and η(MgZn 2 ) transformed to the η′ phase.…”

Effect of Blending of Shellac, Carbonyl Iron Powder, and Carbonyl Iron Powder/Carbon Nanotube Microcapsules on the Properties of Coatings

“…This can achieve better impedance matching with air, thereby reducing coating thickness and increasing electromagnetic-absorption bandwidth. They are ideal choices for developing high-performance electromagnetic-absorption materials [26]. As a typical magnetic metal powder, carbonyl iron powder (CIP) has been widely used as an absorbent, due to the high magnetic permeability, high saturation magnetization, high Curie temperature, excellent absorption performance, and wide electromagnetic-absorption frequency band [27][28][29][30][31].…”