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

Minneci, Robert P.; Lass, Eric A.; Bunn, Jeffrey R.; Choo, Hahn; Rawn, Claudia J.

doi:10.1080/09506608.2020.1821485

Cited by 63 publications

(20 citation statements)

References 77 publications

(376 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apart from coppertin, copper-nickel and aluminum-bronzes are in use in the marine industry specifically for water end entry valves, submarine penetrators, submarine propellers, piston forging, ocular box submarine periscope, submarine acoustic antenna, and bolted propellers [2,3,6,8,9]. Copper-based alloys also found applications in aerospace, architecture, defense, commercial, offshore oil and gas and petrochemical, communication and transponders, actuator valves, oil tankers, desalinization, and water condenser system [10,11]. In the present research, we focus on bronze for marine applications by fabricating bronze-based metal matrix composite with titanium diboride and yttrium oxide.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of mechanical and corrosion properties of TiB₂-Y₂O₃ nanocomposite fused bronze metal matrix composite

Venkatesan¹,

Jerald²,

Sundeep³

et al. 2022

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

The present work is intended to fabricate titanium diboride (TiB2) and yttrium oxide (Y2O3) fused bronze metal matrix composite by stir casting technique to achieve effective mechanical and corrosion properties. TiB2- Y2O3 nanocomposite powders were synthesized using the mechanical milling synthesis technique. Spectroscopic analyses like Powder X-Ray Diffraction (PXRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscope (SEM) were used to characterize the synthesized nanopowders. The XRD data revealed the average crystalline size of 110±5 nanometres with a hexagonal and cubic phase structure of TiB2 and Y2O3. The fundamental modes and other functional groups of the nanocomposite were analyzed using the FTIR analysis. The SEM images revealed the irregular morphological structures of the composite powders. The bronze metal matrix composite is fabricated by varying the weight percentage of TiB2-Y2O3 nanocomposite as 2%, 4%, and 6 wt.% with bronze alloy via stir casting technique. XRD graphs revealed the formation of metal matrix composite and the FESEM graphs revealed the porous morphology of the composite. The mechanical performance of the composite was analyzed by using the tensile, compression, and hardness tests. Specimen with 4% wt.% reinforcement material offered higher mechanical properties with 303 MPa tensile, 810 MPa compression, 141 HRB hardness, and good corrosion resistance. Hence the fabricated TiB2-Y2O3 fused bronze metal matrix composite with good mechanical and corrosion properties can be used for various sea environment applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of mechanical and corrosion properties of TiB₂-Y₂O₃ nanocomposite fused bronze metal matrix composite

Venkatesan¹,

Jerald²,

Sundeep³

et al. 2022

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

show abstract

“…The temperature-dependent 0.2% offset yield strength (σy) and Young's modulus (E) of the different combustor materials are presented in Figure 2-2. This data was aggregated from several sources [28,32,[35][36][37][38]. The modulus of GRCop-84 is assumed to follow the same temperaturedependence as that of pure Cu and is estimated using the correlations in [39].…”

Section: Combustor Materialsmentioning

confidence: 99%

Structural Optimization of Regeneratively Cooled Rotating Detonation Rocket Engines

Jorgensen

Cordero

Vaccaro

2022

AIAA SCITECH 2022 Forum

View full text Add to dashboard Cite

Combustors in rotating detonation rocket engines (RDREs) must withstand prolonged exposure to high heat fluxes (>10 MW/m 2 ) and ultrasonic-frequency detonative loading. Regenerative cooling is being considered for thermal management in RDREs, but there is concern that the cooling channels may fail by fatigue due to the detonative loads. In the present work a structural optimization protocol for regeneratively cooled RDREs is developed and then used to determine optimal cooling channel geometries which minimize thermomechanical stresses that might drive such failures. The analysis considers thermal stresses from temperature gradients through the combustor wall, bending stresses due to cooling channel pressurization, and dynamic stresses from detonative loading. To calculate the dynamic stresses, the combustor hot wall is approximated as a beam on an elastic foundation, where the stiffness of the elastic foundation is a function of the cooling channel geometry and the properties of the combustor material. The structural optimization framework is applied to an exemplary RP2/GOX RDRE combustor, and optimal designs are determined as a function of propellant flow rate for several candidate combustor materials -GRCop-84, IN718, W-25Re, Nb-C103. The deviatoric stress in the hot wall increases monotonically with propellant flow rate. In all cases onset of yielding limits the maximum achievable flow rate. W-25Re can achieve the highest propellant flow rate of the materials considered here, owing to its combination of high thermal conductivity and high strength at elevated temperatures. While thermal stresses dominate most of the design space for each material, dynamic stresses become significant when the detonation wave speed approaches the elastic wave speed of the hot wall. This effect is important in Nb-C103, GRCop-84, and W-25Re combustors, since the detonation wave speed matches the elastic wave speed for cooling channel designs that minimize static stresses. These results highlight the importance of dynamic stresses in regeneratively cooled RDREs, as combustor designs which minimize static stresses can sometimes amplify dynamic stresses, mitigating creep but promoting fatigue.

show abstract

“…Copper alloys are the main candidate materials for the heat sink of the water-cooled target of a divertor in nuclear fusion reactors, due to its high thermal conductivity, strength and good radiation resistance [ 1 , 2 , 3 , 4 , 5 ]. Pure copper has a very high thermal conductivity but its strength is relatively low especially at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Development of Y2O3 Dispersion-Strengthened Copper Alloy by Sol-Gel Method

Xie

et al. 2022

Materials

View full text Add to dashboard Cite

In this study, oxide dispersion-strengthened Cu alloy with a Y2O3 content of 1 wt.% was fabricated through citric acid sol-gel synthesis and spark plasma sintering (SPS). The citric acid sol-gel method provides molecular mixing for the preparation of precursor powders, which produces nanoscale and uniformly distributed Y2O3 particles in an ultrafine-grained Cu matrix. The effects of nanoscale Y2O3 particles on the microstructure, mechanical properties and thermal conductivity of the Cu-1wt.%Y2O3 alloy were investigated. The average grain size of the Cu-1wt.%Y2O3 alloy is 0.42 μm, while the average particle size of Y2O3 is 16.4 nm. The unique microstructure provides excellent mechanical properties with a tensile strength of 572 MPa and a total elongation of 6.4%. After annealing at 800 °C for 1 h, the strength of the alloy does not decrease obviously, showing excellent thermal stability. The thermal conductivity of Cu-1wt.%Y2O3 alloy is about 308 Wm−1K−1 at room temperature and it decreases with increasing temperature. The refined grain size, high strength and excellent thermal stability of Cu-1wt.%Y2O3 alloys can be ascribed to the pinning effects of nanoscale Y2O3 particles dispersed in the Cu matrix. The Cu-Y2O3 alloys with high strength and high thermal conductivity have potential applications in high thermal load components of fusion reactors.

show abstract

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

Cited by 63 publications

References 77 publications

Evaluation of mechanical and corrosion properties of TiB₂-Y₂O₃ nanocomposite fused bronze metal matrix composite

Evaluation of mechanical and corrosion properties of TiB₂-Y₂O₃ nanocomposite fused bronze metal matrix composite

Structural Optimization of Regeneratively Cooled Rotating Detonation Rocket Engines

Development of Y2O3 Dispersion-Strengthened Copper Alloy by Sol-Gel Method

Contact Info

Product

Resources

About

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

Cited by 63 publications

References 77 publications

Evaluation of mechanical and corrosion properties of TiB2-Y2O3 nanocomposite fused bronze metal matrix composite

Evaluation of mechanical and corrosion properties of TiB2-Y2O3 nanocomposite fused bronze metal matrix composite

Structural Optimization of Regeneratively Cooled Rotating Detonation Rocket Engines

Development of Y2O3 Dispersion-Strengthened Copper Alloy by Sol-Gel Method

Contact Info

Product

Resources

About

Evaluation of mechanical and corrosion properties of TiB₂-Y₂O₃ nanocomposite fused bronze metal matrix composite

Evaluation of mechanical and corrosion properties of TiB₂-Y₂O₃ nanocomposite fused bronze metal matrix composite