Surface protection for AA8090 aluminum alloy by diffusion bonding

Wu, Ye-Ee; Lo, Yu-Lin

doi:10.1016/s0167-8442(02)00082-4

Cited by 24 publications

(6 citation statements)

References 13 publications

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“…The eutectic phase distributing throughout the aluminum matrix was more when the temperature or time is increased [13]. Although these atoms are moving during high heat and proper length of time, diffusion rate of atoms also depends on the concentration of each element between two materials [14]. However, during diffusion bonding, it was found that oxygen occurred when it was not under vacuum condition shown in Fig.…”

Section: Diffusion Bonding Of Particles In Bond Linementioning

confidence: 98%

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Evaluation of Microstructure and Mechanical Properties in Dissimilar Joint of SSM7075 with SSM356 Aluminum Alloy using Diffusion Bonding

Dunyakul

Meengam

Maunkhaw

et al. 2016

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Abstract. The aim of this study is to investigate joining parameters that affect microstructure and mechanical properties of diffusion bonding technique in dissimilar joints between SSM7075 and SSM356 aluminum alloys. Diffusion bonding methods were investigated by joining parameters as follows: contact pressure at 3 MPa, holding time 60 and 120 minutes and temperature at 673, 723, 773 and 823 K respectively, under argon atmosphere at 4 liters per minute. After experiments, the results of the investigation have shown that a condition used contact pressure at 3 MPa, holding time 120 minutes, and temperature at 773 K is complete and no defects and voids. Examination of the joint region using SEM and EDX showed that the microstructure in weld zone after welding is globular structure, and eutectics phases of two materials diffuse together. In weld zone, it was found that formation of eutectic phases has Al2CuMg, Mg2Si and Al2Mg2Zn3 phases along the bond interface, distributed throughout bond interface. The tensile tested showed the maximum tensile strength of 94.94 MPa. The hardness was tested for optimum hardness value, 121.20 HV. However, the heat during welding, resulting in precipitation within the aluminum matrix (α-Al), led to increased hardness after diffusion bonding.

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Section: Diffusion Bonding Of Particles In Bond Linementioning

confidence: 98%

“…Micro voids remain very few which is often particularly soiled areas or contaminated areas. Although high temperature for welding makes the pieces adhere together, it causes growth of the grains [14]. Similarly, holding time excessively lead to slowly creep behaviour of grains.…”

Section: Default Fontsmentioning

confidence: 99%

Evaluation of Microstructure and Mechanical Properties in Dissimilar Joint of SSM7075 with SSM356 Aluminum Alloy using Diffusion Bonding

Dunyakul

Meengam

Maunkhaw

et al. 2016

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“…However, due to the formation of oxide films and the lack of matching filler metals with identical solidification modes, traditional methods of joining them are ineffective (Ilangovan et al, 2015). Solid state diffusion bonding, on the other hand, prevents crack formation, significant distortion, and grain boundary segregation in the base metal (Wu and Lo, 2002;Zhao and Zhang, 2008;Wang et al, 2012;Britto et al, 2020). Bonding temperature, bonding strength, and holding time are the most important parameters in diffusion bonding, with temperatures held at 0.5 to 0.8 times the melting point of the parent metal with the lowest melting point (Hill and Wallach, 1989;He et al, 2002;Mahendran et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Diffusion bonding with aluminium alloy 7475 at superplastic temperatures resulted in more cavities in the joints (Sunwoo and Lum, 1995). Pre-treatment of the surface of the AA8090 aluminium alloy resulted in a narrow bond line, similar to that of a grain boundary, with high bond strength (Wu and Lo, 2002). In superplastic 7075 aluminium alloy, the effect of diffusion bonding parameters such as temperature, strain, and time on specific strength was investigated, and it was discovered that proper bonding did not occur until 500 °C at nominal pressures.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties optimization and microstructures of diffusion bonded AA2014/AA7075 al alloys

Britto¹,

Binoj

2022

revmetal

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Diffusion bonding has been successfully used to join dissimilar high-strength aluminium alloys. In bonding AA2014 with AA7075 aluminium alloy, the main diffusion bonding process parameters were optimized to achieve optimum shear and ram tensile strengths. For the strategical planning of experiments, the design of experiment concept was used, as well as the response surface methodology to create statistical models for optimizing the process parameters. The bond strength improved as the interface thickness increased, but above 6 µm (at about 375 °C), the bond strength began to deteriorate. Similarly, the stiffness of the joint interface increased as the process temperature increased due to the development of interfacial phases. The empirical findings were evaluated, and the optimal bonding range was determined in order to maximize the bond’s shear and ram tensile strength.

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“…However, all liquid phase bonding methods utilizing metal inter-layer directly increase the complexity and may decrease the bonding strength. For no-interlayer bonding, the diffusion bonding are achieved directly by application of high temperature and pressure in vacuum to cause the mutual diffusion of atoms between materials [4][5][6][7][8][9][10][11][12]. The quality of bonding mainly depends on cleaning and protection of the surface of bonding pieces .The absence of inter-layer makes the microstructure in the bonding zone to be similar to that of the base material.…”

Section: Introductionmentioning

confidence: 99%

Diffusion Bonding of Aluminum Alloy Using a High-Boiling Liquid Protection

Xie

Sui

2007

MSF

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This paper presents a diffusion bonding technology at vacuum using a high-boiling liquid protection, diethylene glycol dimethyl ether (C6H19O3). After washing in alcohol, the specimens were immersed in diethylene glycol dimethyl ether. Before heating, the vacuum chamber was vacuumized to about 10-1Pa. Then chamber was heated to about 80°C, and held for 20 minute to evaporate the liquid protection in order to make the clean bonding surfaces contact. Metallographic observations of the interface by optical microscope were carried out. The experimental results show that the protections have successfully protected the bonding surfaces from re-oxidation prior to bonding. The metallographs show that the vacancies at the bonding interface bonding at 560°C for 2 hours are obvious and the materials at the interfaces of specimens bonded under the pressure of 5 MPa at 535°C for 2 hours were well joined.

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Surface protection for AA8090 aluminum alloy by diffusion bonding

Cited by 24 publications

References 13 publications

Evaluation of Microstructure and Mechanical Properties in Dissimilar Joint of SSM7075 with SSM356 Aluminum Alloy using Diffusion Bonding

Evaluation of Microstructure and Mechanical Properties in Dissimilar Joint of SSM7075 with SSM356 Aluminum Alloy using Diffusion Bonding

Mechanical properties optimization and microstructures of diffusion bonded AA2014/AA7075 al alloys

Diffusion Bonding of Aluminum Alloy Using a High-Boiling Liquid Protection

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