Development of In-Situ Synthesis of Cr2Nb Reinforced Copper Alloy by Aluminothermic Process

Dhokey, N. B.; Sarve, Sriganesh N.; Lamsoge, H. A.

doi:10.1007/s12666-011-0094-5

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…*Estimated from graph of thermal expansion [2], assume ±5% accuracy. **Converted from quadratic equation where T (°C) and has ±1% reported accuracy [3]. +In the extruded condition with 95% confidence; converted from power law to quadratic equation [4].…”

Section: Low-cycle Fatigue Behaviourmentioning

confidence: 99%

“…Excessive heat flux from or onto surfaces has been a major limiting factor in the development of various technologies such as turbines, rockets, or electronics [1]. The term 'high-heat-flux applications' is used to describe these and similar uses where the heat flux is subjectively high and difficult to manage and has been ascribed to a multitude of applications from welding equipment to fusion reactor components [1][2][3][4]. Defining a range for high-heat-flux is difficult since its perception has evolved with time and differs between different fields and industries.…”

Section: Introductionmentioning

confidence: 99%

“…Ultimate tensile strength as a function of temperature for existing data on GRCop alloys in wrought, extruded, and L-PBF (SLM) conditions with OFHC Cu for comparison; redrawn and combined from[1][2][3][4][5].…”

mentioning

confidence: 99%

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Copper-based alloys for structural high-heat-flux applications: a review of development, properties, and performance of Cu-rich Cu–Cr–Nb alloys

Minneci

Lass

Bunn

et al. 2020

International Materials Reviews

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This review examines the development and current state of Cu-rich Cu-Cr-Nb alloys commonly referred to as GRCop or Glenn Research copper alloys with emphasis on Cu-8Cr-4Nb (at%), or GRCop-84, and Cu-4Cr-2Nb, or GRCop-42. Recent additive manufacturing efforts have increased interest in GRCop alloys, and full-scale hardware has been fabricated using AM techniques and practical hot-fire tests have been conducted, but structure-property relationships are still under development. The development, processing, and current microstructure-property relationships of GRCop alloys are reviewed along with comparisons to similar high-heat-flux Cu alloys including NARloy-Z, GlidCop Al-15, AMZIRC, Cu-1Cr-0.1Zr, and Cu-0.9Cr. The review concludes with an assessment of future prospects for GRCop alloys and overview of advantages provided by additive manufacturing.

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Section: Low-cycle Fatigue Behaviourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Copper-based alloys for structural high-heat-flux applications: a review of development, properties, and performance of Cu-rich Cu–Cr–Nb alloys

Minneci

Lass

Bunn

et al. 2020

International Materials Reviews

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“…Reasonably designing the composition of the alloy and effectively regulating the size of Cr 2 Nb phase are the key to the development of high-performance Cu-Cr-Nb alloy. Dhokey et al [29,30] reported that a Cu-8Cr-4Nb (at%) alloy prepared by casting, in which the Cr 2 Nb phase was with a size of 0.7-7 µm. Guo et al [15] regulated microstructure of casted Cu-0.47Cr-0.16Nb (wt%) alloy by homogenization heat treatment, cold rolling (CR) and aging treatment, and obtained Cr 2 Nb phase with the average size of 0.7 µm around.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Cr2Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy

Liu

Lei

et al. 2020

Materials

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Achieving a good match between strength and conductivity is a challenge of the development of the high-performance Cu-Cr-Nb alloy for aerospace and fusion energy. The effect of heat treatment on Cr2Nb phase, strength and conductivity of spark plasma sintered (SPSed) Cu-2Cr-1Nb (at%) alloy was investigated. The results illustrated that Cr2Nb phase of Cu-2Cr-1Nb alloy can be regulated by heat treatment, multi-scale Cr2Nb phase with sizes of 0.10–0.50 μm, 30–100 nm and less than 30 nm was obtained, and the strength and conductivity were significantly increased after heat treatment at 500 °C for 2 h, the room temperature tensile strength and conductivity were 332 MPa and 86.7% IACS, 2.5% and 34.8% higher than those of as-SPSed alloy; the tensile strength at 700 °C was 76 MPa. Increasing heat treatment temperature and time, the tensile strength of the alloy was reduced by 1.5%, 4.3% and 12.3% after heat treatment at 500 °C, 700 °C and 950 °C for 72 h. The good match between strength and conductivity of Cu-Cr-Nb alloy was obtained by reducing the content of alloying elements (Cr and Nb) and microstructure regulation. This approach can be used to prepare structural/functional materials with excellent strength and conductivity.

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“…Initial attempt to fabricate Cu-8Cr-4Nb alloy by melting powders of Copper, chromium and niobium using vacuum induction furnace was tried [8]. Another attempt in the synthesis of Cu-8Cr-4Nb was noted using suitable combination of powder and liquid metallurgy in which aluminothermic process was used [9].…”

Section: Introductionmentioning

confidence: 99%

<i>In Situ</i> Synthesis of Cr<sub>2</sub>Nb Reinforced Copper Alloy by Liquid Metallurgy Route

Dhokey

Sarve

Lamsoge

2012

MSF

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Cu-8Cr-4Nb alloy with high strength and high thermal conductivity have received a lot of attention over the last decades due to promising role in space application of rocket combustion chamber of reusable launch vehicle. In the present work, the copper alloy is synthesized in induction furnace by liquid metallurgy route wherein elemental powders of chromium and niobium was used added into premelted copper melt under argon atmosphere. The cast product is characterised for hardness, optical, SEM, EDS and XRD. It is possible to produce this alloy with reproducible average hardness of 135 VHN. The precipitate of Cr2Nb showed moderate distribution in and around the grain boundaries of copper with precipitate size varying from 1.33 μm to7.0 μm.

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Development of In-Situ Synthesis of Cr2Nb Reinforced Copper Alloy by Aluminothermic Process

Cited by 6 publications

References 5 publications

Copper-based alloys for structural high-heat-flux applications: a review of development, properties, and performance of Cu-rich Cu–Cr–Nb alloys

Copper-based alloys for structural high-heat-flux applications: a review of development, properties, and performance of Cu-rich Cu–Cr–Nb alloys

Effect of Heat Treatment on Cr2Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy

<i>In Situ</i> Synthesis of Cr<sub>2</sub>Nb Reinforced Copper Alloy by Liquid Metallurgy Route

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