Controlling Al/Cu composite diffusion layer during hydrostatic extrusion by using colloidal Ag

Lee, T.H.; Lee, Y.J.; Park, K.T.; Nersisyan, Hayk H.; Jeong, Hye-Jin; Lee, J.H.

doi:10.1016/j.jmatprotec.2012.10.001

Cited by 35 publications

(13 citation statements)

References 11 publications

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“…Hence, interfacial reactions between copper and aluminum are technically and scientifically important in many technological applications. Many scholars have studied different processing methods for fabricating Cu/Al couples, such as diffusion bonding [3][4], friction stir welding [5][6], compound casting [7][8], and hydrostatic extrusion [9]. It is well known that with different methods and conditions, different intermetallic compounds (IMCs) are likely to form at the Cu/Al interface.…”

Section: Introductionmentioning

confidence: 99%

Microstructural characterization of Cu/Al composites and effect of cooling rate at the Cu/Al interfacial region

Han

Ben

Yao

et al. 2015

Int J Miner Metall Mater

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Cu/Al composites are of vital importance in industrial applications because of their numerous advantages. The influence of bonding temperature and cooling rate on the microstructure and morphology of Cu/Al composites was investigated in this paper. The interfacial morphology and constituent phases at the Cu/Al interface were analyzed by optical microscopy and field-emission scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy. The results indicate that effective Cu-Al bonding requires a higher bonding temperature to facilitate interdiffusion between the two metals. The microstructural characteristics are associated with various bonding temperatures, which impact the driving force of interdiffusion. It is observed that cooling rate exerts a significant influence on the morphology and amount of the intermetallic compounds at the interfacial region. Meanwhile, microhardness measurements show that hardness varies with the bonding temperature and rate of cooling.

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Section: Introductionmentioning

confidence: 99%

Microstructural characterization of Cu/Al composites and effect of cooling rate at the Cu/Al interfacial region

Han

Ben

Yao

et al. 2015

Int J Miner Metall Mater

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“…5 is that the highest MH can be achieved at P S of 120 MPa. It is due to the fact that at low P S premature solidification occurs which propagates nucleation and micro cracks which in turn reduce the hardness of joint interface [4,19].…”

Section: Parametric Main Effects Plotsmentioning

confidence: 99%

“…Manufacturing of high-performance materials at a competitive cost is now the essential demand of industry for their survival in this competitive environment. Among the different options, overcast manufacturing seems to be an attractive alternative [3,4]. But in overcast manufacturing, the desired properties can only be achieved if a suitable joining technique is selected.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous techniques have been used by the researchers for joining similar and dissimilar metals. These techniques are mainly classified into three categories: (A) solid-solid bonding, like explosive welding [5], laser welding [6], friction stir welding [7], hydrostatic extrusion [4], brazing [8], and rolling [9]; (B) solid-liquid bonding, for instance, overcasting [10,11] and hot dipping [12]; (C) liquid-liquid bonding, such as direct chill casting [13], lost-foam casting [14], and continuous casting [15]. It is worth mentioning that solid-solid bonding is time consuming and costly due to the shape and design constraints of the substrate.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical characterization of aged AA2026-AA2026 overcast joints fabricated by squeeze casting

Ali

Ishfaq

Raza

et al. 2020

Int J Adv Manuf Technol

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Squeeze overcasting has emerged as an attractive option for casting of Al alloys in terms of mechanical properties. The attainment of the desired magnitude of these properties is challenging in overcasting due to the involvement of a number of process parameters. In this study, the effects of insert preheat temperature (T I) along with pouring temperature (T P), and squeeze pressure (P S) on the mechanical properties of squeeze overcast AA2026-AA2026 joint were investigated. Experimental results revealed that the squeeze pressure is the most prominent factor affecting the ultimate tensile strength (UTS) while micro-hardness (MH) is significantly influenced by the pouring temperature. Maximum values of UTS (315 MPa) and MH (130 HV) were achieved at a P S of 120 MPa, T P of 780°C, and T I of 250°C. Energy dispersive X-ray (EDX) analysis witnessed that T I has also a significant role in determining the quality of bond between the substrate and the melt. Scanning electron microscopy (SEM) depicts that the morphology of the fractured surface has a sound influence on both selected responses. Both the strength and hardness are noticed better if the fractured surface possesses the flat-faced morphology. Furthermore, an empirical regression model was developed using response surface methodology (RSM) design and validated through eight confirmatory experiments. RSM integrated multi-objective optimization genetic algorithm (MO-GA) was deployed to optimize the UTS and MH. The comparative results obtained from RSM and MO-GA demonstrated that the deviation in experimental and predicted values is less than 5%.

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“…The diffusion layer is mainly composed of ferrite and pearlite. Lee [12] examined the effect of different temperatures, pressure rates, and intermediate layers on the composite diffusion behavior of Al/Cu. A prediction model of the thickness of the diffusion layer and the hardness of the interface was established by the regression method.…”

Section: Introductionmentioning

confidence: 99%

Study of a Bimetallic Interfacial Bonding Process Based on Ultrasonic Quantitative Evaluation

Zhang

Liu

et al. 2018

Metals

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The interfacial bonding process and mechanical properties of AISI (American Iron and Steel Institute) stainless steel/Q235A carbon steel were investigated by deformation bonding, heat preservation, and tensile tests. The results reveal that the deformation temperature has a beneficial effect on the bonding rate, and that the critical temperature for the large-area bonding of stainless steel and carbon steel is approximately 700 • C. However, owing to the short contact time, only a shallow diffusion of approximately 2-3 µm can be achieved. A slight decrease in the interfacial bonding rate after heat preservation is correlated to the difference between the thermal expansion coefficients of the two materials, but the thickness of the diffusion layer shows a significant increase. It was found that the strength of the composites is mostly related to the bonding rate and the strength of the relatively soft material, which can be determined using an explicit equation. Moreover, with the increase in the interfacial bonding rate, the crack source changes from the junction of the unbonded and bonded areas of the interface to the interior of the carbon steel. The failure mode evolves from cleavage brittle fracture to ductile-brittle mixed-mode fracture, and then to ductile fracture.

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Controlling Al/Cu composite diffusion layer during hydrostatic extrusion by using colloidal Ag

Cited by 35 publications

References 11 publications

Microstructural characterization of Cu/Al composites and effect of cooling rate at the Cu/Al interfacial region

Microstructural characterization of Cu/Al composites and effect of cooling rate at the Cu/Al interfacial region

Mechanical characterization of aged AA2026-AA2026 overcast joints fabricated by squeeze casting

Study of a Bimetallic Interfacial Bonding Process Based on Ultrasonic Quantitative Evaluation

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