Effect of C addition on the liquid phase separation in an as-cast Cu–14Fe alloy

et al. 2019

Materials

Effects of C addition on the microstructures of as-cast Cu–Fe–P (mass fraction) alloys were systematically investigated. The results show that C addition can refine the matrix microstructure and make Fe particles finer. The Fe particles observed in both the non-C-alloyed and C-alloyed specimens are α-Fe particles, which possess a body-centered cubic (bcc) structure with a Nishiyama–Wassermann orientation relationship with the matrix. C is reported to be an γ-Fe stabilizer in the literature. The reason for the difference between the phases of Fe particles observed in this study, and that reported in the literature, are finally discussed. Additionally, C addition facilitates the decomposition of the supersaturated solid solution which occurs by the simultaneous precipitation of very fine Fe particles. Such initial decomposition product has an face-centered cubic (fcc) structure with a cube-on-cube orientation relationship with the matrix.

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of C Addition on the Microstructures of As-Cast Cu–Fe–P Alloys

Chen

et al. 2019

Materials

“…If carbon can promote separation of iron dissolved in the copper matrix, it is favorable for enhancing electrical conductivity of the alloy. In recent years, there are some reports about effects of carbon on microstructure of Cu-Fe alloy [11,12] . However, what are the effects of subsequent annealing after cold deformation with high strain on the microstructure and properties of Cu-Fe-C alloy needs to be further researched.…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing on the Microstructure and Properties of Drawn Cu-14Fe-0.05C Alloy

Jiang

et al. 2020

MSF

Cu-14Fe-0.05C alloy was prepared by using the vacuum melting process and then multipass drawing deformation was performed. After that, the alloy in the as-drawn state was annealed. Based on this, the influence of annealing temperature on microstructure, mechanical performance and electrical conductivity of the alloy was studied. The results showed that the speed of recovery and recrystallization of the as-drawn Cu-14Fe-0.05C alloy accelerates and iron-rich fibers gradually become slender, bend and fracture, with the increase of annealing temperature. The tensile strength of the alloy constantly decreases, while elongation continuously rises and resistivity gradually reduces. With the extension of annealing time, tensile strength and resistivity of the Cu-14Fe-0.05C alloy gradually decreases, while elongation gradually increases.

“…According to Cu-C and Fe-C phase diagrams, carbon is almost insoluble in copper while tends to bind with iron. In recent years, there are some researches and reports about effects of carbon on microstructure of Cu-Fe alloy [14,15] . However, what are the influences of cold deformation processing with high strain on microstructure and performances of Cu-Fe-C alloy needs to be researched.…”

Section: Introductionmentioning

confidence: 99%

Study on Microstructure and Properties of Cu-14Fe-0.05C Alloy Prepared by Drawing

Jiang

et al. 2020

MSF

Cu-14Fe-0.05C alloy was prepared by using the vacuum melting process and then multipass drawing deformation was performed. The results showed that with rise of drawing strain, iron-rich phases in the Cu-14Fe-0.05C alloy gradually change from irregularly distributed coarse dendritic phases in the as-cast state to slender fibrous ones distributed parallel along the drawing direction. The higher the strain is, the slender and denser the fibers are and the more uniform the distribution is. Moreover, more interfaces are found between copper matrix and iron-rich phases and the hardness and resistivity of the alloy become higher.