Microstructure and texture variations of a cold-rolled multiphase FeCrCuMnNi high-entropy alloy were studied after different annealing treatments.Samples were heat-treated at different temperatures and for different t...Microstructure and texture variations of a cold-rolled multiphase FeCrCuMnNi high-entropy alloy were studied after different annealing treatments.Samples were heat-treated at different temperatures and for different time,and then,subjected to different tests including XRD and SEM-EBSD.The results reveal that the FCC1 phase,which goes through more strain,has lower melting temperature,and recrystallizes earlier(lower temperature and shorter time).In addition,it is seen that particle stimulated nucleation is more effective on the recrystallization of this phase compared to FCC2 phase.A significant number of FCC1 nuclei form around the BCC particles.Nucleation of FCC2 phase initiated at 800℃mostly at the grain boundaries and the inhomogeneities.The FCC1 phase was almost fully recrystallized at this temperature.The annealing process led to the elimination of rolling textures,while the Brass component remained a major component in the recrystallized samples.Increasing annealing temperature as well as annealing time led to the formation of Cube texture component,which is a major component of recrystallized low stacking fault energy materials.Furthermore,D and Rt-Co components formed during recrystallization as a result of the formation of annealing twins.展开更多
Layered composites have attracted considerable interest in the recent literature on metal composites. Their mechanical properties depend on the quality of the bonding provided by the intermediate layers. In this study...Layered composites have attracted considerable interest in the recent literature on metal composites. Their mechanical properties depend on the quality of the bonding provided by the intermediate layers. In this study, we analyzed the mechanical properties and bond strengths provided by the nickel layer with respect to its thickness and nature(either powder or coating). The results suggest that bond strength decreases with an increase in the content of nickel powder. At 0.3 vol% of nickel coating, we found the nature of nickel to be less efficient in terms of bond strength. A different picture arose when the content of nickel was increased and the bond strength increased in nickel coated samples. In addition, the results demonstrate that mechanical properties such as bend strength are strongly dependent on bond strength.展开更多
基金The financial support from the Iran National Science Foundation (INSF) through contract No. 97018809 is kindly appreciated
文摘Microstructure and texture variations of a cold-rolled multiphase FeCrCuMnNi high-entropy alloy were studied after different annealing treatments.Samples were heat-treated at different temperatures and for different time,and then,subjected to different tests including XRD and SEM-EBSD.The results reveal that the FCC1 phase,which goes through more strain,has lower melting temperature,and recrystallizes earlier(lower temperature and shorter time).In addition,it is seen that particle stimulated nucleation is more effective on the recrystallization of this phase compared to FCC2 phase.A significant number of FCC1 nuclei form around the BCC particles.Nucleation of FCC2 phase initiated at 800℃mostly at the grain boundaries and the inhomogeneities.The FCC1 phase was almost fully recrystallized at this temperature.The annealing process led to the elimination of rolling textures,while the Brass component remained a major component in the recrystallized samples.Increasing annealing temperature as well as annealing time led to the formation of Cube texture component,which is a major component of recrystallized low stacking fault energy materials.Furthermore,D and Rt-Co components formed during recrystallization as a result of the formation of annealing twins.
文摘Layered composites have attracted considerable interest in the recent literature on metal composites. Their mechanical properties depend on the quality of the bonding provided by the intermediate layers. In this study, we analyzed the mechanical properties and bond strengths provided by the nickel layer with respect to its thickness and nature(either powder or coating). The results suggest that bond strength decreases with an increase in the content of nickel powder. At 0.3 vol% of nickel coating, we found the nature of nickel to be less efficient in terms of bond strength. A different picture arose when the content of nickel was increased and the bond strength increased in nickel coated samples. In addition, the results demonstrate that mechanical properties such as bend strength are strongly dependent on bond strength.
