Statistical optimization of parameters for enhanced properties of diffusion bonded AA6061 and AA 7075 aluminium alloys

Palanisamy, D.; Britto, A. Sagai Francis; Binoj, J. S.; Manikandan, N.

doi:10.1016/j.matpr.2020.07.614

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…Furthermore, several process parameter combinations would be experimented with to achieve good metallurgical bonds. However, a high bonding temperature is not always necessary for some metal joints, where favourable mechanical properties can also occur at lower bonding temperatures [13][14][15][16][17][18]. The strong and stable oxide stability and reasonable oxygen solubility of aluminium at higher temperatures make the diffusion bonding di cult by inhibiting the diffusion of atoms, resulting in a weak bond.…”

Section: Introductionmentioning

confidence: 99%

Influence of Bonding Temperature on AA2219/Ti-6Al-4V Solid State Diffusion Bonding Joints- Microstructure and Mechanical Characterization

Vatnalmath,

Auradi,

Murthy

et al. 2024

Preprint

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An attempt has been made to join AA2219 and Ti-6Al-4V by solid state diffusion bonding (SSDB), as this process ensures no macroscopic deformation during the joining. The quality of SSDB joints formed at the bonding temperature in the range of 500-540°C is evaluated using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and x-ray diffraction (XRD). The bonding strength of the joints is evaluated by shear test, and hardness is tested using the Vickers microhardness method. It is observed that the Hardness and shear strength values are increased with an increase in bonding temperature owing to the formation of intermetallic compounds at the joint interface like Al3Ti, Al2Ti and AlTi. Maximum shear strength of 82.48 MPa is observed for the specimen bonded at 540°C.

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Section: Introductionmentioning

confidence: 99%

Influence of Bonding Temperature on AA2219/Ti-6Al-4V Solid State Diffusion Bonding Joints- Microstructure and Mechanical Characterization

Vatnalmath,

Auradi,

Murthy

et al. 2024

Preprint

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“…The authors reported that the bond efficiency compared to the base material strength was only 56%. Diffusion bonding of dissimilar AA6061–AA7075 pairs at bonding temperatures of 325–425 °C (in a vacuum chamber), bonding pressure of 2–18 MPa and holding time of 15–75 min was investigated in [ 23 ]. Using ram tensile and lap shear specimen configurations, a maximum bonding strength of about 77 MPa in tension and 55 MPa in shear was obtained at a bonding temperature of 375 °C, a bonding pressure of 10 MPa and a holding time of 45 (min).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Time, Atmosphere and Surface Roughness on the Interface Strength and Microstructure of AA6061–AA1050 Diffusion Bonded Components

et al. 2023

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Diffusion bonding experiments followed by tensile testing were conducted on cylindrical pairs of AA6061–AA1050 aluminum alloys. The influence of bonding time, atmosphere and surface roughness on the resulting interface strength was studied. Metallurgical characterization was performed to study the quality of the bonded interface for different process conditions, and also to investigate the process of oxide formation on the specimen surface. Finite element analysis of the bonding experiments was used to study the thermo-mechanical fields during the bonding process. Using a cohesive zone approach for modelling the bonded interface, the bond strength for the different process parameters was quantified. The results demonstrate that high bond strength can be obtained even for specimens bonded in an air furnace, provided the surface roughness is low. When the surface roughness increases, specimens bonded in air show a reduction in interface strength, which is not observed for specimens bonded in vacuum. Inspection of the bonded interface suggests that this reduction in interface strength can be attributed to oxidation and pockets of air trapped between the asperities of the contact surface, which hinder diffusion and plastic flow.

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“…Difusion bonding is usually carried out at the temperature range of 50-80% of the melting temperature of the metal, and the quality of the bonding joints mainly depends on the process variables such as temperature, pressure, and time [20,21]. However, the adherent and chemically stable oxide flms on the faying surface of the aluminium and its alloys must be removed before the difusion bonding process to curb the formation of metallurgical diferences at the bonded joints [22,23]. Te prior cleaning of the faying surface of aluminium with alkaline and acidic solutions is one such technique to minimize the formation of oxides during difusion bonding [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution in Nonvacuum Solid-State Diffusion Bonded Joints of AA2219

Vatnalmath

Auradi

Bharath

et al. 2023

Advances in Materials Science and Engineering

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Solid-state diffusion bonding of AA2219 alloy is carried out under the nonvacuum condition to form AA2219/AA2219 joints. In the currently adopted method, AA2219 alloys are joined under the bonding temperature of 450–500°C, bonding pressure of 10 MPa, and bonding time of 30 min. Chemical cleaning is adopted to protect the joining surfaces from reoxidation before the diffusion bonding process. Microstructure evolution at the bonded joints is characterized using optical microscopy, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The hardness at the bonded joints increased with the increase in the bonding temperature. The parent metal structure is achieved at 500°C bonding temperature with an increase in hardness of 112.14 Hv at the bond interface. There is no evidence of intermetallic found at the interface, as confirmed by X-ray diffraction (XRD).

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Statistical optimization of parameters for enhanced properties of diffusion bonded AA6061 and AA 7075 aluminium alloys

Cited by 8 publications

References 17 publications

Influence of Bonding Temperature on AA2219/Ti-6Al-4V Solid State Diffusion Bonding Joints- Microstructure and Mechanical Characterization

Influence of Bonding Temperature on AA2219/Ti-6Al-4V Solid State Diffusion Bonding Joints- Microstructure and Mechanical Characterization

The Influence of Time, Atmosphere and Surface Roughness on the Interface Strength and Microstructure of AA6061–AA1050 Diffusion Bonded Components

Microstructural Evolution in Nonvacuum Solid-State Diffusion Bonded Joints of AA2219

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