Establishing empirical relationships to predict grain size and tensile strength of friction stir welded AA 6061-T6 aluminium alloy joints

Rajakumar, S.; Muralidharan, C.; Balasubramanian, V.

doi:10.1016/s1003-6326(09)60387-3

Cited by 117 publications

(44 citation statements)

References 13 publications

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“…Raja kumar et al [9] optimized FSW process to attain maximum tensile strength of AA7075-T6 aluminum alloy by using the central composite face-centered (CCF) design of experiment (DOE). In their study, an attempt was made to establish an empirical relationship between the FSW process parameters, tool dimension, hardness, and the tensile strength of the joint.…”

Section: Introductionmentioning

confidence: 99%

A study to estimate the tensile strength of friction stir welded AA 5059 aluminium alloy joints

Babu

Karunakaran

Balasubramanian

2015

Int J Adv Manuf Technol

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Friction stir welding (FSW) is an important welding technique where in, and optimizing the process parameters will improve the joint strength of the welds. The FSW process and tool parameters play a major role in determining the joint strength. In this paper, an attempt has been made to establish an empirical relationship between the FSW process parameters (rotational speed, welding speed, and axial force) and predicting the maximum tensile strength of the joint. Statistical tools such as design of experiments, analysis of variance, and regression analysis are used to develop the relationships. A non-heat treatable aluminum alloy Aluminium Association 5059 of 4 mm thickness was used as the base material. Response surface methodology is employed to develop the mathematical model. Analysis of variance technique is used to check the adequacy of the developed mathematical model. The developed mathematical model can be used effectively at 95 % confidence level. The effect of FSW process parameter on mechanical property of Aluminium Association 5059 aluminum alloy has also been analyzed in detail.

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Section: Introductionmentioning

confidence: 99%

A study to estimate the tensile strength of friction stir welded AA 5059 aluminium alloy joints

Babu

Karunakaran

Balasubramanian

2015

Int J Adv Manuf Technol

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“…However, in the case of the present composite, the improvement of strength cannot be observed. According to the results of Rajakumar et al (2010), the effect of grain size on strength was not so large. Thus, in this composite, the effect of the weakness of interfacial strength between matrix and fiber on the strength of the composite is more dominant than the effect of grain size on the strength of the composite.…”

Section: Experimental Results and Discussion 41 Strength Propertiesmentioning

confidence: 96%

“…This shows that the interfacial strength between fiber and matrix is weak and the reason why the strength in Z direction is significantly lower. Rajakumar et al (2010) and Kim et al (2010) studied the effect of grain size of the matrix on strength properties. They confirmed that the tensile strength increased with decreases in grain size of matrix.…”

Section: Experimental Results and Discussion 41 Strength Propertiesmentioning

confidence: 99%

Temperature dependence on thermal and strength properties of aluminum based high thermal conductive composites containing VGCF-CNT fillers

Fukuchi

Sasaki

Imanishi

et al. 2018

Mechanical Engineering Journal

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Aluminum (Al) based composites containing vapor-growth carbon fibers (VGCF) and carbon nanotubes (CNT) has been developed by authors for a decade using spark plasma sintering (SPS). It has been clarified that the thermal conductivity of the composite is three times higher than that of a normal Al matrix. The maximum volume fraction of VGCF within the composites to obtain high thermal conductivity was 60%. However, this high volume fraction of VGCF may have a negative effect on the strength of the composite. These composites are intended for use in controlling heat in radiation fins of a heat exchanger or a heat sink. Thus, strength properties and thermal conductivities of the composite at high temperatures should be precisely clarified. In this paper, temperature dependencies of both thermal conductivities and strength properties of the composite are investigated. Pure tensile tests and measurements of thermal conductivity by laser flash methods are conducted at high temperatures. Both the strength properties and the thermal conductivities of the composite decrease with increase in temperature. However, the decreasing behaviors of these properties were different in the Al matrix. The change in the strength of the composite due to temperature is smaller than that of the Al matrix and also smaller than the thermal conductivity of the composites.

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“…Several authors explored the mechanical, microstructure, and fractography properties of weldment by deploying instruments such as scanning electron microscope (SEM) [14][15][16][17][18]. In numerical modeling, response surface methodology (RSM) was used to determine the relation between the parameters of FSW process and to identify appropriate settings that optimize the properties of welded joints [3,13].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the tensile properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational speed

et al. 2016

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Friction stir welding (FSW) process has gained attention in recent years because of its advantages over the conventional fusion welding process. These advantages include the absence of heat formation in the affected zone and the absence of large distortion, porosity, oxidation, and cracking. Experimental investigations are necessary to understand the physical behavior that causes the high tensile strength of welded joints of different metals and alloys. Existing literature indicates that tensile properties exhibit strong dependence on the rotational speed, traverse speed, and axial force of the tool that was used. Therefore, this study introduces the experimental procedure for measuring tensile properties, namely, ultimate tensile strength (UTS) and tensile elongation of the welded AA 7020 Al alloy. Experimental findings suggest that a welded part with high UTS can be achieved at a lower heat input compared with the high heat input condition. A numerical approach based on genetic programming is employed to produce the functional relationships between tensile properties and the three inputs (rotational speed, traverse speed, and axial force) of the FSW process. The formulated models were validated based on the experimental data, using the statistical metrics. The effect of the three inputs on the tensile properties was investigated using 2D and 3D analyses. A high UTS was achieved, including a rotational speed of 1050 r/min and traverse speed of 95 mm/min. The results also indicate that 8 kN axial force should be set prior to the FSW process.

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Establishing empirical relationships to predict grain size and tensile strength of friction stir welded AA 6061-T6 aluminium alloy joints

Cited by 117 publications

References 13 publications

A study to estimate the tensile strength of friction stir welded AA 5059 aluminium alloy joints

A study to estimate the tensile strength of friction stir welded AA 5059 aluminium alloy joints

Temperature dependence on thermal and strength properties of aluminum based high thermal conductive composites containing VGCF-CNT fillers

Characterization of the tensile properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational speed

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