High-entropy alloys(HEAs)have become essential materials in the aerospace and defense industries due to their remarkable mechanical properties,which include wear resistance,fatigue endurance,and corrosion resistance.T...High-entropy alloys(HEAs)have become essential materials in the aerospace and defense industries due to their remarkable mechanical properties,which include wear resistance,fatigue endurance,and corrosion resistance.The welding of high-entropy alloys is a cutting-edge field of study that is attracting a lot of interest and investigation from research organizations and businesses.Welding defects including porosity and cracks are challenging problem and limit the development of welding HEAs.This paper provides a comprehensive review of research on weldability of HEAs and the application of diverse welding techniques on welding HEAs over recent years.The forming mechanism and control strategies of defects during welding HEAs were provided in this work.Various welding techniques,including arc welding,laser welding,electron beam welding,friction stir welding,diffusion bonding and explosive welding,have been extensively investigated and applied to improve the microstructure and mechanical properties of HEAs joints.Furthermore,an in-depth review of the microstructure and mechanical properties of HEAs joints obtained by various welding methods is presented.This paper concludes with a discussion of the potential challenges associated with high-entropy alloy welding,thus providing valuable insights for future research efforts in this area.展开更多
In this study,the effect of varied loading ratio(mass of the explosive/mass of flyer plate)on the nature of interface,temperature and pressure developed in aluminum-steel explosive cladding is presented.Increase in th...In this study,the effect of varied loading ratio(mass of the explosive/mass of flyer plate)on the nature of interface,temperature and pressure developed in aluminum-steel explosive cladding is presented.Increase in the loading ratio,R,enhances the pressure developed,kinetic energy utilization and deformation work performed.Interfacial microstructures exhibit the formation of molten layer at few spots,owing to the increase in temperature beyond the melting point of parent alloy.The increase in temperature and the quantum of pressure developed were determined by numerical simulation performed in Ansys AUTODYN by employing smoothed particle hydrodynamics(SPH)method.The positioning of the experimental conditions on the weldability window is presented as well.展开更多
This paper investigates the effects of the physical properties on the microstructure and weldability of explosive welding by joining two metals with a significant contrast in thermophysical properties:stainless steel ...This paper investigates the effects of the physical properties on the microstructure and weldability of explosive welding by joining two metals with a significant contrast in thermophysical properties:stainless steel and copper.Sound welds between stainless steel and copper were obtained,and the interfacial morphology was wavy,regardless of the position of the materials.The weldability of dissimilar pairs was found to be more dependent on the relationship between the physical properties of the base materials than on the absolute value of the material property.When there is a significant difference in thermal conductivity between the flyer and the base plate,together with a material with a low melting temperature,the weldability of the pair is often poor.The relative position of the plates affects the interfacial microstructure even when similar morphologies are found.For the metallic pairs studied,the wave size was bigger for the configuration in which the ratio between the density of the flyer and the density of the base plate is smaller.The same phenomenon was observed for the impedance:bigger waves were found for a smaller ratio between the impedance of the flyer and the impedance of the base plate.展开更多
基金Project(52105351)supported by the National Natural Science Foundation of ChinaProject(24KJA460002)supported by the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province,ChinaProject(G2023014009L)supported by the High-end Foreign Experts Recruitment Plan of China。
文摘High-entropy alloys(HEAs)have become essential materials in the aerospace and defense industries due to their remarkable mechanical properties,which include wear resistance,fatigue endurance,and corrosion resistance.The welding of high-entropy alloys is a cutting-edge field of study that is attracting a lot of interest and investigation from research organizations and businesses.Welding defects including porosity and cracks are challenging problem and limit the development of welding HEAs.This paper provides a comprehensive review of research on weldability of HEAs and the application of diverse welding techniques on welding HEAs over recent years.The forming mechanism and control strategies of defects during welding HEAs were provided in this work.Various welding techniques,including arc welding,laser welding,electron beam welding,friction stir welding,diffusion bonding and explosive welding,have been extensively investigated and applied to improve the microstructure and mechanical properties of HEAs joints.Furthermore,an in-depth review of the microstructure and mechanical properties of HEAs joints obtained by various welding methods is presented.This paper concludes with a discussion of the potential challenges associated with high-entropy alloy welding,thus providing valuable insights for future research efforts in this area.
文摘In this study,the effect of varied loading ratio(mass of the explosive/mass of flyer plate)on the nature of interface,temperature and pressure developed in aluminum-steel explosive cladding is presented.Increase in the loading ratio,R,enhances the pressure developed,kinetic energy utilization and deformation work performed.Interfacial microstructures exhibit the formation of molten layer at few spots,owing to the increase in temperature beyond the melting point of parent alloy.The increase in temperature and the quantum of pressure developed were determined by numerical simulation performed in Ansys AUTODYN by employing smoothed particle hydrodynamics(SPH)method.The positioning of the experimental conditions on the weldability window is presented as well.
基金sponsored by FEDER funds through the program COMPETE-Programa Operacional Factores de Competitividadeby national funds through FCT-Funda??o para a Ciência e a Tecnologia,under the project UIDB/00285/2020。
文摘This paper investigates the effects of the physical properties on the microstructure and weldability of explosive welding by joining two metals with a significant contrast in thermophysical properties:stainless steel and copper.Sound welds between stainless steel and copper were obtained,and the interfacial morphology was wavy,regardless of the position of the materials.The weldability of dissimilar pairs was found to be more dependent on the relationship between the physical properties of the base materials than on the absolute value of the material property.When there is a significant difference in thermal conductivity between the flyer and the base plate,together with a material with a low melting temperature,the weldability of the pair is often poor.The relative position of the plates affects the interfacial microstructure even when similar morphologies are found.For the metallic pairs studied,the wave size was bigger for the configuration in which the ratio between the density of the flyer and the density of the base plate is smaller.The same phenomenon was observed for the impedance:bigger waves were found for a smaller ratio between the impedance of the flyer and the impedance of the base plate.
