Anomalous enhancement of strength-ductility combination in FSW joints of AA7039

Paul, Atanu; Sinha, Sukanta; Chattopadhyay, Paramita; Ganguly, Subhas

doi:10.1016/j.mfglet.2019.09.002

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…The rotational speed was maximum contributing factor for the investigation of tensile strength. FSW was employed by Paul et al [12] to study the effect of pin profile on aluminium alloy plates (AA7039). Experimentation with a distinct pin profiles revealed that the ductility was enhanced at a low grain boundary angle.…”

Section: Introductionmentioning

confidence: 99%

Sequential procedure to investigate the optimal ranges of process parameters for the FSW of AA8090

Dahiya,

Gupta

2023

Eng. Res. Express

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The main purpose of this experiment is to evaluate the optimum range of process parameters for Friction Stir welding of AA8090. In the present research work, an experiment has been made to join AA8090 alloy using friction stir welding (FSW) at different rotational speed, welding speed and tilt angle settings. The FSW was done on the CNC (Computer Numeric Control) Vertical milling machine using fixture and a cylindrical threaded tool. For designing experiments, the steepest ascent technique (Factorial Design) was used considering tilt angle, welding speed and rotational speed as input parameters and ultimate tensile strength (UTS) as an output parameter. The metallurgical and mechanical characteristics were investigated and considered while providing the sequential procedure for the optimal range. The optimum range of values observed at tilt angle (1.1° to 1.9°), welding speed (24.6 to 48.2 mm min−1), and rotational speed (1428 to 1876 r min−1). The maximum value of UTS (365 MPa) is obtained at rotational speed of 1652 r min−1, welding speed of 36.4 mm min−1, and tilt angle of 1.5°. Scanning electron microscopy and optical microscope were used for fractrography and microstructural analyses of the joints. The finer grains are observed in the NZ equated to the HAZ and TMAZ.

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Section: Introductionmentioning

confidence: 99%

Sequential procedure to investigate the optimal ranges of process parameters for the FSW of AA8090

Dahiya,

Gupta

2023

Eng. Res. Express

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“…Paul et al. 12 used FSW for joining AA7039 plates with different pin profiles. It was found that the fraction of low angle grain boundary plays an important role in the enhancement of strength–ductility combination.…”

Section: Introductionmentioning

confidence: 99%

“…It was observed that the results obtained by ANN are capable of estimating the tensile strength results with the response surface model. Paul et al 12 used FSW for joining AA7039 plates with different pin profiles. It was found that the fraction of low angle grain boundary plays an important role in the enhancement of strength-ductility combination.…”

Section: Introductionmentioning

confidence: 99%

Procedure to find out the optimal ranges of process parameters for friction stir welding

Verma

Misra

Gupta

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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The present study deals with the application of sequential procedure (i.e. steepest ascent) to obtain the optimum values of process parameters for conducting friction stir welding (FSW) experiments. A vertical milling machine is modified by fabricating fixture and tool ( H13 material) for performing FSW operation to join AA7039 plates. The steepest ascent technique is employed to design the experiments at different rotational speed, welding speed, and tilt angle. The ultimate tensile strength is considered as a performance characteristic for deciding the optimal levels. The mechanical and metallurgical characteristics of the joints are studied by executing tensile and microhardness tests. It is concluded from the graphical analysis of the steepest ascent technique that the optimal maximum and minimum values are 1812–1325 r/min for rotational speed, 43–26 mm/min for welding speed, and 2°–1.3° for tilt angle, respectively. Besides, optical microscope and scanning electron microscope are utilized for microstructural and fractographic analyses for a better understanding of the process.

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