Evaluation of intermediate phases formed on the bonding interface of hot pressed Cu/Al clad materials

Lee, Kwang Seok; Lee, Sang Mok; Lee, Jong-Sup; Kim, Yong-Bae; Lee, Geun-An; Lee, Sang-Pill

doi:10.1007/s12540-016-6245-9

Cited by 13 publications

(2 citation statements)

References 17 publications

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“…Despite the influence of formed Cu(Al) solid solution on strengthening of the samples in coating, strain hardening, increasing of dislocation densities, and refinement of the grain size due to milling can be considered as other factors in increasing of components’ hardness. Lee's investigation [32] also showed that the formation of Al 4 Cu 9 intermetallic compound especially in interface of Al/Cu was a key factor in raising of hardness. In another report [33], it is revealed that Al increases Cu hardness up to 50%.…”

Section: Resultsmentioning

confidence: 99%

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Surface mechanical coating of Cu plate by Cu Al powders

Farahbakhsh

Mashimo

2018

Surface Engineering

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Through Surface Mechanical Coating (SMC), a plate of pure Cu was successfully coated using of Al-50-wt% Cu during mechanical alloying. Effect of milling time and heat treatment on formation of coating at 1050 °C was investigated. Compositional and microstructural study of the coating and its properties were conducted by means of X-Ray Diffraction (XRD), Microfocus XRD, Scanning Electron Microscopic (SEM), Electron Probe Micro-Analyzer (EPMA), Transition Electron Microscopic (TEM), and Vickers Microhardness test. Analyses results showed that Al4Cu9, Cu(Al), and AlCu3 phases were formed. The results also showed that heating causes the composite coating created by SMC to be replaced with moderate concentrations of Cu and Al. Through heat treatment, coating hardness will be reduced to even half, while thickness has a twofold increase. As milling time rises, atomic diffusion depth for heated samples will be raised also. TEM investigations approved the presence of amorphous phase and 10nm grain size.

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Section: Resultsmentioning

confidence: 99%

“…TEM reviews proved amorphous phase in milled samples and showed that the average size of grain was 10 nm. M A -15 min-75 Hz 400 Cu-Al [34] Explosive clad 0 0 90 Cu/Al [32] Hot-pressed clad material-200 MPa 1 250 713…”

Section: Discussionmentioning

confidence: 99%

Surface mechanical coating of Cu plate by Cu Al powders

Farahbakhsh

Mashimo

2018

Surface Engineering

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High‐performance Cu/Al laminated composites fabricated by horizontal twin‐roll casting

Liu

Wang

et al. 2018

Materialwissenschaft Werkst

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Horizontal twin-roll casting technology was successfully introduced to produce high-performance copper/aluminum (Cu/Al) laminated composites. The interface morphology, electrical properties and peeling strength after different annealing and cold rolling processes were investigated and contrasted with Cu/Al clad plates fabricated by conventional methods. The results show that sound metallurgical bonding between the copper and aluminum matrix can be attained after the horizontal twin-roll casting processes and Al 2 Cu is the only intermetallics at the interfacial region, the thickness of interfacial interlayer is about 0.7 mm. The peeling strength is 31.4 N/mm and can be further increased to 37.1 N/mm after annealing at 250 8C. However, higher temperature like 400 8C will cause the excessive growth of intermetallics so that peeling strength sharply decreases to 9.2 N/mm. Electrical conductivity of the clad plate is 51 MS/m. At the same electrical current intensity, the temperature-rise of the composite plate is between the pure copper plate and the aluminum plate, and closer to the copper plate. All of the properties are outstanding than that of Cu/Al clad plate fabricated by conventional methods.

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Multi-material Joining of an Aluminum Alloy to Copper, Steel, and Titanium by Hybrid Metal Extrusion & Bonding

Bergh

Fyhn

Sandnes

et al. 2023

Metall Mater Trans A

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Hybrid metal extrusion & bonding (HYB) is a solid-state welding method where an aluminum (Al) filler wire is continuously extruded into the weld groove between the metal parts to be joined by the use of a rotating steel tool that provides friction and plastic deformation. Although the HYB method was originally invented for Al joining, the process has shown great potential also for multi-material joining. This potential is explored through characterization of a unique Al–copper–steel–titanium (Al–Cu–steel–Ti) butt joint made in one pass. Each of the three dissimilar metal interface regions are characterized in terms of microstructure and tensile properties. Scanning and transmission electron microscopy reveals that bonding is achieved through a combination of nanoscale intermetallic phase formation and microscale mechanical interlocking. Electron diffraction is used to identify the main intermetallic phases present in the interfacial layers. Machining of miniature specimens enables tensile testing of each interface region. Overall, the presented characterization demonstrates the great potential for multi-material joining by HYB and provides fundamental insight into solid-state welding involving bonding of Al to Ti, steel, and Cu.

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Evaluation of intermediate phases formed on the bonding interface of hot pressed Cu/Al clad materials

Cited by 13 publications

References 17 publications

Surface mechanical coating of Cu plate by Cu Al powders

Surface mechanical coating of Cu plate by Cu Al powders

High‐performance Cu/Al laminated composites fabricated by horizontal twin‐roll casting

Multi-material Joining of an Aluminum Alloy to Copper, Steel, and Titanium by Hybrid Metal Extrusion & Bonding

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