Light alloys have irreplaceable advantages such as high specific strength and low density.They are indispensable structural materials in aerospace,military,and marine engineering.It is an enduring research hotspot to ...Light alloys have irreplaceable advantages such as high specific strength and low density.They are indispensable structural materials in aerospace,military,and marine engineering.It is an enduring research hotspot to prepare high-strength and high-toughness light alloys to play a more significant role in advanced engineering applications.As a new method to improve the mechanical properties of light alloys,the magnetic field-assisted process can produce magnetoplastic effects.Therefore,in this paper,research progress on the magnetoplastic effects of light alloys assisted by magnetic fields was reviewed,and the effects of magnetic fields on dislocations,grain refinement,precipitation kinetics,phase transformation,and mechanical properties of light alloys were elucidated.Magnetic field treatment transforms radical pairs from the ground state to the excited state,which reduces the resistance between dislocations and obstacles,facilitating dislocation depinning.Moreover,magnetic field can promote grain refinement and phase transformation,increase precipitation kinetics,and synergistically improve strength and elongation.Finally,the prospects of magnetic field-assisted processes of light alloys were discussed.展开更多
Pulsed magnetic treatment(PMT)has been adopted as an effective strengthening method for engineering materials and components in recent years,and the development of its application depends on the comprehensive understa...Pulsed magnetic treatment(PMT)has been adopted as an effective strengthening method for engineering materials and components in recent years,and the development of its application depends on the comprehensive understanding of the nature of PMT.The deep mechanism was thought initially to be the magnetostrictive effect,while further investigation found that the magnetic field could lead to the change of the defect states in the crystal,which is called the magnetoplastic effect.Due to the complexity of the engineering materials,manifestations of the magnetoplastic effect become more diverse,and they were reviewed in the form of microstructure homogenization and interfacial stabilization.Further,the mechanism of the magnetoplastic effect was discussed,focusing on the changes in the spin states under the external magnetic field.Microstructure modifications could also alter material performances,especially the residual stress,plasticity,and fatigue properties.Therefore,PMT with specific parameters can be utilized to obtain an ideal combination of microstructure,residual stress,and mechanical properties for better service performance of different mechanical parts,and its applications on machining tools and bearings are perfect examples.This work reviews the effect of PMT on the microstructure and properties of different materials and the mechanism,and it also summarizes the fundamental applications of PMT on essential mechanical parts.展开更多
基金supported by the National Natural Science Foundation of China(No.52274382)the National Key Research and Development Program of China(No.2023YFB3407000).
文摘Light alloys have irreplaceable advantages such as high specific strength and low density.They are indispensable structural materials in aerospace,military,and marine engineering.It is an enduring research hotspot to prepare high-strength and high-toughness light alloys to play a more significant role in advanced engineering applications.As a new method to improve the mechanical properties of light alloys,the magnetic field-assisted process can produce magnetoplastic effects.Therefore,in this paper,research progress on the magnetoplastic effects of light alloys assisted by magnetic fields was reviewed,and the effects of magnetic fields on dislocations,grain refinement,precipitation kinetics,phase transformation,and mechanical properties of light alloys were elucidated.Magnetic field treatment transforms radical pairs from the ground state to the excited state,which reduces the resistance between dislocations and obstacles,facilitating dislocation depinning.Moreover,magnetic field can promote grain refinement and phase transformation,increase precipitation kinetics,and synergistically improve strength and elongation.Finally,the prospects of magnetic field-assisted processes of light alloys were discussed.
基金the financial supports from National Key R&D Program of China(No.2020YFA0714900)Joint Fund of the Ministry of Education(No.8091B012201)National Natural Science Foundation of China(No.52031003).
文摘Pulsed magnetic treatment(PMT)has been adopted as an effective strengthening method for engineering materials and components in recent years,and the development of its application depends on the comprehensive understanding of the nature of PMT.The deep mechanism was thought initially to be the magnetostrictive effect,while further investigation found that the magnetic field could lead to the change of the defect states in the crystal,which is called the magnetoplastic effect.Due to the complexity of the engineering materials,manifestations of the magnetoplastic effect become more diverse,and they were reviewed in the form of microstructure homogenization and interfacial stabilization.Further,the mechanism of the magnetoplastic effect was discussed,focusing on the changes in the spin states under the external magnetic field.Microstructure modifications could also alter material performances,especially the residual stress,plasticity,and fatigue properties.Therefore,PMT with specific parameters can be utilized to obtain an ideal combination of microstructure,residual stress,and mechanical properties for better service performance of different mechanical parts,and its applications on machining tools and bearings are perfect examples.This work reviews the effect of PMT on the microstructure and properties of different materials and the mechanism,and it also summarizes the fundamental applications of PMT on essential mechanical parts.
