Study of β-precipitates and their effect on the directional yield asymmetry of friction stir processed and aged AZ91C alloy

Jain, Vipin; Mishra, Rajiv S.; Gupta, Anil; Gouthama,

doi:10.1016/j.msea.2012.09.095

Cited by 42 publications

(10 citation statements)

References 38 publications

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“…are found to play major roles in determining the quality of the weldments, 6 thereby creating an essential need for controlling them to produce high-quality joints. Therefore, diverse and extensive experimental works [7][8][9][10][11] concentrating on controlling these FSW process parameters in an effective manner and understanding the levels of influence of these parameters in determining the properties of joints were carried out.…”

Section: Introductionmentioning

confidence: 99%

Role of tool rotational speed in influencing microstructural evolution, residual-stress formation and tensile properties of friction-stir welded AZ80A Mg alloy

Sevvel¹,

Satheesh²

2018

Mater. Tehnol.

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Joining flat plates of the AZ80A Mg alloy was carried out using the friction-stir-welding technique, employing various speeds of rotation (the tool), and it was observed that an M-shaped distribution characterizes the stress (residual) distributed in the longitudinal direction. Apart from this, the longitudinal stress (tensile) on the advancing side (AS) was found to be larger than that on the retreating side (RS) in the stir zone. It was experimentally recorded that there seem to be a slight increase in the stress values (tensile longitudinal residual), an increase in the tool rotational speed, and an increase in the peak tensile longitudinal stresses at the edge of the shoulder on the AS of the joints. The grain structures in the stir zone were also found to be influenced by the speed of the tool. Observations of fracture surfaces indicated that dimples and ridges resulted in a ductile fracture and quasi-cleavage resulted in a brittle fracture.

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Section: Introductionmentioning

confidence: 99%

Role of tool rotational speed in influencing microstructural evolution, residual-stress formation and tensile properties of friction-stir welded AZ80A Mg alloy

Sevvel¹,

Satheesh²

2018

Mater. Tehnol.

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“…Further, the need for the post welding cleaning of the alloys is completely eliminated when the alloys are welded using FSW. Moreover, an absence of the melting of the base metal provides more benefits to the friction stir welding process compared with other conventional welding techniques [3]. These various attractive and promising characteristic features of FSW make them to be one of the most preferable fabrication processes for joining Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Evolution of Microstructures and Characterization During FSW of Az80a Mg Alloy

Sevvel

Jaiganesh

2017

Archives of Metallurgy and Materials

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Experimental investigation was conducted to find out microstructural characteristic changes arising in the weldments AZ80A Mg alloys obtained using the friction stir welding. Tools with three different pin profile geometries were employed during this investigation at constant tool rotational speed and feed rate. Tensile tests are performed and the tensile fracture surfaces are examined using the Scanning Electron Microscope (SEM) and the obtained SEM images are used for microstructural investigations. From the experimental results, it was observed that the geometry of the tool pin plays a significant role in producing essential stirring action there by regulating the flow of the plasticized material and leading to the formation of small sized grains having equally distributed fine strengthening precipitates. These structured grains have a direct reflecting impact in increasing the hardness and mechanical properties of the fabricated joints at the nugget zone of the friction stir welded AZ80A Mg alloy joints.

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“…The most commonly employed Mg alloys for the aerospace and automotive industries are the AZ91 alloys. Besides, their wider applications, these alloys are restricted for some applications because their strength is not high enough to meet the needs [3]. At the same time, AZ80 Mg alloys having high strength values are restricted to usage due to their deformation ability which is very poor [4].…”

Section: Introductionmentioning

confidence: 99%

Influence of The Arrangement of Materials and Microstructural Analysis During FSW of AZ80A & AZ91C Mg Alloys

Sevvel

Jaiganesh

2017

Archives of Metallurgy and Materials

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The main objective of this paper is to produce defect free weldments with improved properties during friction stir welding of dissimilar Mg alloys. The influence of the anisotropic arrangement of materials when AZ80A Mg alloy is taken as advancing side and AZ91C Mg alloy as retreating side and vice versa with respect to their mechanical properties and microstructural characteristics were investigated. The effects of various FSW parameters on the quality of these joints were also analyzed and best optimized FSW parameters were suggested. Defect free sound joints with excellent mechanical properties were produced when AZ80A Mg alloy was positioned at retreating side. At the same time, it seems a little bit difficult to obtain good quality joints with the contrary arrangement of materials. These investigations revealed that materials having inferior plastic deformability must be kept at the advancing side to obtain sound joints during FSW of dissimilar alloys of Magnesium.

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Study of β-precipitates and their effect on the directional yield asymmetry of friction stir processed and aged AZ91C alloy

Cited by 42 publications

References 38 publications

Role of tool rotational speed in influencing microstructural evolution, residual-stress formation and tensile properties of friction-stir welded AZ80A Mg alloy

Role of tool rotational speed in influencing microstructural evolution, residual-stress formation and tensile properties of friction-stir welded AZ80A Mg alloy

Investigation on Evolution of Microstructures and Characterization During FSW of Az80a Mg Alloy

Influence of The Arrangement of Materials and Microstructural Analysis During FSW of AZ80A & AZ91C Mg Alloys

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