Effect of Annealing on the Microstructure and Properties of In-situ Cu–Nb Microcomposite Wires

Deng, Liping; Wang, Bingshu; Xiang, Huimin; Yang, Xiaofang; Niu, Rong; Han, Ke

doi:10.1007/s40195-016-0432-z

Cited by 11 publications

(5 citation statements)

References 45 publications

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“…That is why the problem of thermal stability of Cu-Nb composites is of great importance. The loss of their strength at annealing is mostly associated with modification of the specific structure of Nb filaments in the copper matrix, namely, with transformation of ribbon-like filaments into bamboo-like ones, that is, their spheroidizing and coarsening [28][29][30]. In this regard, the microstructural investigation of composite at different annealing temperatures, which allows specifying the temperature of the beginning and end of softening after different true strains before the annealing, is of significant interest.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Features in Multicore Cu–Nb Composites

et al. 2021

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The study is devoted to heavily drawn multicore Cu–18Nb composites of cylindrical and rectangular shapes. The composites were fabricated by the melt-and-deform method, namely, 600 in situ rods of Cu–18%Nb alloy were assembled in a copper shell and cold-drawn to a diameter of 15.4 mm (e = 10.2) and then rolled into a rectangular shape the size of 3 × 5.8 mm (e = 12.5). The specimens were analyzed from the viewpoints of their microstructure, microhardness, and thermal stability. The methods of SEM, TEM, X-ray analysis, and microhardness measurements were applied. It is demonstrated that, at higher strain, the fiber texture 110Nb∥ 111Cu∥ DD (drawing direction), characteristic of this material, becomes sharper. The distortions of niobium lattice can be observed, namely, the 110 Nb interplanar distance is broadened in longitudinal direction of specimens and compacted in transverse sections. The copper matrix lattice is distorted as well, though its distortions are much less pronounced due to its recrystallization. Evolution of microstructure under annealing consists mainly in the coagulation of ribbon-like Nb filaments and in the vanishing of lattice distortions. The structural changes in Nb filaments start at 300–400 °C, then develop actively at 600 °C and cause considerable decrease of strength at 700–800 °C.

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Section: Introductionmentioning

confidence: 99%

Microstructural Features in Multicore Cu–Nb Composites

et al. 2021

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“…Recently, high magnetic field (HMF) has been successfully applied to material design and productions [8][9][10][11][12]. The HMF not only significantly influences the liquid/solid solidification micro-/macro-structures for both ferromagnetic and non-ferromagnetic metals [13], but also a powerful tool to affect the crystallization process of amorphous alloy, texture formation of the crystallized phases [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…The HMF not only significantly influences the liquid/solid solidification micro-/macro-structures for both ferromagnetic and non-ferromagnetic metals [13], but also a powerful tool to affect the crystallization process of amorphous alloy, texture formation of the crystallized phases [14][15][16][17]. The constant and strong magnetic field shows both magnetic forces and transmits highintensity energy to the atomic scale of matter without contact, thus changing the whole energy of the material phases and dynamic behavior of atomic arrangement, matching and migration [9,11,12,18,19]. Tsurekawa et al applied a 6 T magnetic field to a typical Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 alloy and concluded that the HMF increased the nucleation rate of α-Fe but hardly demonstrated any obvious effects on the grain size refinements during the crystallization process [20].…”

Section: Introductionmentioning

confidence: 99%

Precipitation of α-Fe from Fe84−xSi4B12+x (x = 1, 3) Amorphous Alloys Under High Magnetic Field Annealing

Duan

Wang

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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This work aims to investigate the effects of high magnetic field annealing (HMFA) on the precipitation of α-Fe from Fe 84−x Si 4 B 12+x (x = 1, 3) amorphous precursors. Isothermal annealing process for Fe 81 Si 4 B 15 and Fe 83 Si 4 B 13 amorphous ribbons has been performed with and without the magnetic field. The magnetic field shows the effects of increasing the nucleation rate and decreasing the grain size of α-Fe crystals simultaneously, during the crystallization processes of the investigated amorphous alloys. By applying HMF, α-Fe crystals with more homogeneous distribution and smaller grain size are achieved in the amorphous matrix, which is crucial helpful to improve the magnetic properties for Fe-Si-B amorphous alloys. The mechanism of HMFA affecting the crystallization microstructure is also discussed in the present work.

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“…The quality of final metal product is largely dependent on the solidification structure that emerges during the initial casting [1][2][3][4]. A refined microstructure with reduced defects in as-cast billets yields improved properties in end products [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Coil Configuration Design on Al Solidified Structure Refinement

Zhao

Han

et al. 2020

Metals

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This paper outlines our effort to optimize PMO (Pulsed Magneto-Oscillation) design in order to improve the efficiency of ingot manufacturing. SPMO-H (Simplified Surface Pulse Magneto-Oscillation) and CPMO-H (Simplified Compound Pulse Magneto-Oscillation) were presented on the basis of SPMO (Surface Pulse Magneto-Oscillation) and CPMO (Compound Pulse Magneto-Oscillation). Our numerical and experimental results showed that optimized PMO coil design offered us a device that enabled the operator to examine and operate the melt more convenient without losing the efficiency and decreasing refinement effect. Our work also showed the distance between the coil and the melt surface had little effect on the grain sizes refined. Therefore, in ingot production, the dropping of melt surface is not a problem for PMO application.

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Effect of Annealing on the Microstructure and Properties of In-situ Cu–Nb Microcomposite Wires

Cited by 11 publications

References 45 publications

Microstructural Features in Multicore Cu–Nb Composites

Microstructural Features in Multicore Cu–Nb Composites

Precipitation of α-Fe from Fe84−xSi4B12+x (x = 1, 3) Amorphous Alloys Under High Magnetic Field Annealing

Effect of Coil Configuration Design on Al Solidified Structure Refinement

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