Quantitative study on the correlation between microstructure and mechanical properties of additive friction stir deposited 6061-T6 Al-Mg-Si alloy

Chen, G.; Wu, Kefei; Yu, Wenbin; Sun, Yu; Wang, Xiaohan; Zhu, Zheng; Hu, Fengfeng

doi:10.1016/j.jmrt.2023.07.097

Cited by 20 publications

(3 citation statements)

References 21 publications

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“…It is also worth noting that deformed grains appear in Figure 14ac, with percentages of 12.52%, 26.61%, and 78.43%, respectively. This phenomenon is inconsistent with the almost-no-deformed-grains phenomenon described by Chen et al [52] for 6061 aluminium alloy during the AFSD process. The likely explanation for this is the significantly larger bar size used in this study, resulting in an elevated heat input, higher heating temperature, and prolonged holding time.…”

Section: Analysis Of Microstructurecontrasting

confidence: 92%

“…In Figure 18b,c, small and deep tough holes are found at the fracture; the larger and deeper the tough holes, the greater the second phase, and the better the plastic deformation ability of the material. According to Chen et al [52], this formation of tough holes is likely to result from strong bonding between the materials to produce plastic tensile deformation, which indicates that the material has good elongation, as shown in Figure 17a. Meanwhile, in Figure 18d, the compositional analysis for the tough holes only found Al and O elements, which may be due to the small heat input at 600 rpm; the solid solution phases inside the material have not been precipitated yet, along with the pinning phenomenon inside the crystals.…”

Section: Mechanical Propertymentioning

confidence: 96%

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Effect of Rotational Shear and Heat Input on the Microstructure and Mechanical Properties of Large-Diameter 6061 Aluminium Alloy Additive Friction Stir Deposition

Zhu,

Wang,

Wang

et al. 2024

Crystals

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Additive friction stir deposition (AFSD), in which molten metal materials are formed into free-form stacked structural parts according to the path design, may have a wide range of applications in high-efficiency mass production. In this study, experiments were conducted for the rotational speed in the AFSD parameters of 6061 aluminium alloy bars to investigate the effects of different rotational shear conditions and heat inputs on the properties of the deposited layer for diameter bars based on the analysis of the micro-morphology, micro-tissue composition, and mechanical properties. The width and thickness of each layer were constant, approximately 40 mm wide and 2.5 mm thick. The particle undulations on the surface of the deposited layer were positively correlated with the AFSD rotational speed. Continuous dynamic recrystallisation in the AFSD process can achieve more than 90% grain refinement. When the rotational speed increases, it causes localised significant orientation and secondary deformation within the recrystallised grains. The ultimate tensile strength of the deposited layer was positively correlated with the rotational speed, reaching a maximum of 211 MPa, and the elongation was negatively correlated with the rotational speed, with a maximum material elongation of 37%. The cross-section hardness of the deposited layer was negatively correlated with the number of thermal cycles, with the lowest hardness being about 45% of the base material and the highest hardness being about 80% of the base material.

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Section: Analysis Of Microstructurecontrasting

confidence: 92%

Section: Mechanical Propertymentioning

confidence: 96%

Effect of Rotational Shear and Heat Input on the Microstructure and Mechanical Properties of Large-Diameter 6061 Aluminium Alloy Additive Friction Stir Deposition

Zhu,

Wang,

Wang

et al. 2024

Crystals

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“…Various aspects of the mechanical and microstructural properties of AFSD AA6061 parts have been studied in the literature. The relationship between process parameters (deposition tool's rotation and traverse speed and feed-rate) and the mechanical properties and the microstructure/nanostructure properties for AA6061 parts that are made using AFSD has been investigated in studies [17,[58][59][60]. Zhu et al employed neutron diffraction to investigate the distribution of residual stress across the thickness of an AA6061 part that was fabricated using AFSD [61].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Layer Thickness on the Mechanical Properties of Additive Friction Stir Deposition-Fabricated Aluminum Alloy 6061 Parts

Ghadimi,

Talachian,

Ding

et al. 2024

Metals

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Solid-state additive friction stir deposition (AFSD) is a thermomechanical-based additive manufacturing technique. For this study, AFSD was utilized to produce aluminum alloy 6061 (AA6061) blocks with varying layer thicknesses (1 mm, 2 mm, and 3 mm). The mechanical properties were assessed through uniaxial tensile tests and Vickers microhardness measurement, and statistical analysis was employed to investigate differences among data groups. The results revealed that the deposition layer thickness influences tensile properties in the building (Z) direction, while the properties in the X and Y directions showed minor differences across the three AFSD blocks. Furthermore, variations in tensile properties were observed depending on the sample orientation in the AFSD blocks and its depth-wise position in the part in the building direction. The microhardness values decreased non-linearly along the building direction, spread across the width of the part’s cross-section, and highlighted that the deposition layer thickness significantly affects this property. The 1 mm block exhibited lower average microhardness values than the 2 mm and 3 mm blocks. The temperature histories and dynamic heat treatment are influenced by the deposition layer thickness and depend on the location of the point being studied in the part, resulting in variations in the microstructure and mechanical properties along the building direction and across the part’s width.

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Mechanical Properties of Additive Friction Stir Deposits

Avery,

Perry

2024

Solid‐State Metal Additive Manufacturing

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Quantitative study on the correlation between microstructure and mechanical properties of additive friction stir deposited 6061-T6 Al-Mg-Si alloy

Cited by 20 publications

References 21 publications

Effect of Rotational Shear and Heat Input on the Microstructure and Mechanical Properties of Large-Diameter 6061 Aluminium Alloy Additive Friction Stir Deposition

Effect of Rotational Shear and Heat Input on the Microstructure and Mechanical Properties of Large-Diameter 6061 Aluminium Alloy Additive Friction Stir Deposition

The Effects of Layer Thickness on the Mechanical Properties of Additive Friction Stir Deposition-Fabricated Aluminum Alloy 6061 Parts

Mechanical Properties of Additive Friction Stir Deposits

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