Contact reactive brazing of Al alloy/Cu/stainless steel joints and dissolution behaviors of interlayer

Wu, Mingyang; Si, Naichao; Chen, Jian

doi:10.1016/s1003-6326(11)60818-2

Cited by 15 publications

(7 citation statements)

References 11 publications

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“…The composition of the liquid phase was uneven, the Cu concentration near the Cu side was relatively high, and the Al concentration near the Al side was also relatively high. Because diffusion coefficient of atoms in the liquid phase was very large [41], the speed of the liquid phase composition homogenization was very fast. Meanwhile, atomic interdiffusion between the liquid phase and the Al matrix continued.…”

Section: Contact Reaction Brazing Zonementioning

confidence: 99%

Interface microstructure and fracture behavior of single/dual-beam laser welded steel-Al dissimilar joint produced with copper interlayer

Chen

Zhai

Huang

et al. 2015

Int J Adv Manuf Technol

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Dissimilar metal welding of Q235 low carbon steel and 5052 aluminum alloy was carried out by a single/dualbeam laser in a steel-on-aluminum overlap configuration with a copper interlayer. The weld appearance, microstructure, and fracture behavior of the joints made by the single/dual-beam laser welding were investigated comparatively. The results showed that dual-beam laser welding, compared with singlebeam laser welding, had better process stability which made better weld appearance and bigger effective joining width which enhanced tensile capacity. With a copper interlayer, a contact reaction zone appeared between the copper interlayer and aluminum matrix, which enlarged effective joining zone. The microstructures of the welding joint welded by a single/ dual-beam laser were composed of the ligulate fusion zone with Fe-Al interface and the contact reaction brazing zone with Al-Cu interface. The Fe-Al interface mainly consisted of α-Al and Al 2 Cu eutectic structure, FeAl, FeAl 2 , and a certain amount of Al-Cu intermetallics, Fe 2 Al 5 and FeAl 3 . The Al-Cu interface mainly consisted of eutectic phase Al 2 Cu and metastable phase of Al-Cu intermetallics. The tensile property was enhanced by a dual-beam laser, and the addition of the copper-foil interlayer might improve the metallurgical reaction of interfacial reaction region and promote the loadcarrying ability of weld joint. An ideal joint with fewer defects could be obtained when the welding speed is 0.9-1.25 m/min of dual-beam laser welding and 1.5-1.75 m/min of singlebeam laser welding.

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Section: Contact Reaction Brazing Zonementioning

confidence: 99%

Interface microstructure and fracture behavior of single/dual-beam laser welded steel-Al dissimilar joint produced with copper interlayer

Chen

Zhai

Huang

et al. 2015

Int J Adv Manuf Technol

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“…Furthermore, diffusion of Cu extended into the Al-alloy away from the joint. The decrease in Cu content at the joint interface resulted in isothermal solidification at the eutectic temperature [34].…”

Section: Microstructural Development In Jointsmentioning

confidence: 99%

Transient Liquid Phase Bonding of Al-6063 to Steel Alloy UNS S32304

Saleh

Roven

Khan

et al. 2018

JMMP

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Transient liquid phase (TLP) bonding of 6063 aluminum alloy (Al-6063) and duplex alloy 2304 stainless steel (UNS S32304) was performed using copper foil as an interlayer between the base metals. A compression load was applied normal to the specimens. Metallurgical examination of the produced joints showed three distinct regions including a reaction zone, diffusion affected zone, and the base metals. The diffusion of copper into aluminum resulted in an Al–Cu eutectic structure. However, the oxide layer on the aluminum surface controlled the dissolution behavior of copper and the extent of its wettability with the base metals. Although voids and intermetallic compounds were detected at the interfaces of the processed joints, a defect free joint was produced at 570 °C. In addition, the results from corrosion tests showed that the use of copper as an interlayer decreased the corrosion resistance of the joints. However, increase in thickness of the joining reaction zone with increasing bonding temperature was observed to increase corrosion resistance.

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“…% Cu was added to the Al-12Si. Contact reactive brazing is a kind of brazing method without any brazing flux [ 21 ], which has been widely applied for brazing Al alloys to other alloys, such as Al6063 [ 22 ], Al6061 to AZ31B Mg alloy [ 23 ], and Al6063 to 1Cr18Ni9Ti stainless steel [ 24 ]. Schällibaum et al [ 25 ] studied the microstructure of the AA6082 brazed joints with plating copper, and the results showed that the formation of defects was caused by the residual oxide films aggregated in the brazed joint.…”

Section: Introductionmentioning

confidence: 99%

“…Schällibaum et al [ 25 ] studied the microstructure of the AA6082 brazed joints with plating copper, and the results showed that the formation of defects was caused by the residual oxide films aggregated in the brazed joint. Wu et al [ 24 ] used Cu as an interlayer to join Al6063 and 1Cr18Ni9Ti stainless steel by contact reactive brazing. In fact, the existence of an oxide film on the surface of the aluminum alloy and titanium alloy prevented the diffusion and reaction during the brazing process, which deteriorated the interfacial microstructure and then reduced the joining properties [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Contact Reactive Brazing of TC4 Alloy to Al7075 Alloy with Deposited Cu Interlayer

Yang

Niu

et al. 2021

Materials

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The brazing of Titanium alloy to Aluminum alloy is of great significance for lightweight application, but the stable surface oxide film limits it. In our work, the surface oxide film was removed by the ion bombardment, the deposited Cu layer by magnetron sputtering was selected as an interlayer, and then the contact reactive brazing of TC4 alloy to Al7075 alloy was realized. The microstructure and joining properties of TC4/Al7075 joints obtained under different parameters were observed and tested, respectively. The results revealed that the intermetallic compounds in the brazing seam reduced with the increased brazing parameters, while the reaction layer adjacent to TC4 alloy continuously thickened. The shear strength improved first and then decreased with the changing of brazing parameters, and the maximum shear strength of ~201.45 ± 4.40 MPa was obtained at 600 °C for 30 min. The fracture path of TC4/Al7075 joints changed from brittle fracture to transgranular fracture, and the intergranular fracture occurred when the brazing temperature was higher than 600 °C and the holding time exceeded 30 min. Our work provides theoretical and technological analyses for brazing TC4/Al7075 and shows potential applications for large-area brazing of titanium/aluminum.

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Contact reactive brazing of Al alloy/Cu/stainless steel joints and dissolution behaviors of interlayer

Cited by 15 publications

References 11 publications

Interface microstructure and fracture behavior of single/dual-beam laser welded steel-Al dissimilar joint produced with copper interlayer

Interface microstructure and fracture behavior of single/dual-beam laser welded steel-Al dissimilar joint produced with copper interlayer

Transient Liquid Phase Bonding of Al-6063 to Steel Alloy UNS S32304

Contact Reactive Brazing of TC4 Alloy to Al7075 Alloy with Deposited Cu Interlayer

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