Microstructure and Residual Stress Distributions Under the Influence of Welding Speed in Friction Stir Welded 2024 Aluminum Alloy

Moghadam, Danial Ghahremani; Farhangdoost, Khalil; Nejad, Reza Masoudi

doi:10.1007/s11663-016-0611-3

Cited by 52 publications

(13 citation statements)

References 36 publications

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“…The grain size in the SZ for the different welding conditions does not change significantly. Similarly, Moghadam et al [53] obtained grain sizes from 5 to 20 lm in the SZ, where they demonstrated that both increase in the rotational speed and welding speed, rise the grain size in the SZ. The minor grain size is due to the reduced heat input, derived from the In addition to the welding and rotational speeds, as responsible for the heat generation and grain size, other factors can be featured.…”

Section: Metallographic Analysismentioning

confidence: 77%

“…Moreover, the absence of flash point out both sufficient energy input and tool penetration. Moghadam et al [53] welded AA2024-T3 using different parameters in order to determine the condition that provides the best mechanical strength of the joint, which was reached for m/x ratios of 0.03-0.05 mm/rev. Comparatively, these are lower than the ones used in the present study, in which the maximum is 0.18 mm/rev.…”

Section: Metallographic Analysismentioning

confidence: 99%

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Effect of the energy input on the microstructure and mechanical behavior of AA2024-T351 joint produced by friction stir welding

Vale

Santos

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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Butt joints of AA2024-T351, with 6 mm thickness, were friction-stir-welded. The objective was to investigate the effects of the energy input on the microstructure and mechanical properties of the joints. The welded joints were tested employing a Mo-Va tool, with shoulder and pin diameter of 15 and 6 mm, respectively. The parameters were selected according to visual inspection of the welds, bending test, and microstructural analysis. Constant values of rotational speed and axial force were employed: 1000 rpm and 13 kN, respectively. The welding speed varied from 3 to 6 mm/s. Temperature measurements were performed along the welding process, analysis by optical microscope, microhardness, and bending tests. The process parameters selected resulted in butt joints with good characteristics, no microvoids, and full penetration. The base metal presented mainly S-type compounds, while in the HAZ thickening and loss of coherence of this precipitates are found. A more refined microstructure was found in the stir zone, based on the CDRX mechanism, with evidences of GDRX in the SZ/TMAZ (AS). As far away from the weld the indentation line is, lower is the hardness of the stir zone. The joints presented a similar increase in the mechanical resistance, with loss in ductility.

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Section: Metallographic Analysismentioning

confidence: 77%

Section: Metallographic Analysismentioning

confidence: 99%

Effect of the energy input on the microstructure and mechanical behavior of AA2024-T351 joint produced by friction stir welding

Vale

Santos

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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“…Al-Cu, alloy has been used as an aerospace material for many years primarily due to its high weldability and high specific strength in addition to the excellent cryogenic properties so to be successfully used for manufacturing of cryogenic fuel tanks for space launchers. When welding with al-Cu alloys by fusion welding gives more defects like porosity, hot cracking and liquation cracking thus alternative welding method should be chosen [1][2][3][4][5]. Friction stir welding (FSW) is an innovative, environment friendly and energy-efficient process which has evolved as favorable joining process for welding aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Microstructure Analysis of AA2024 Welded Joints by Friction Stir Welding

Rajkumar¹,

Raja²,

Lingadurai³

et al. 2020

JNMES

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Process of joining different components by the application of external heat has resulted in induced stress on metals. Friction stir welding has been developed in order to avoid such residual stress development while joining. In this present work, aluminium alloy AA2024 plates were welded by using Friction stir welding process. The experiments were conducted for different combinations of parameters such as rotational speed, transverse speed and axial load. Welded joints developed were tested for mechanical and microstructure analysis. Mechanical joints developed have a maximum hardness of 147.6 hv in nugget zone and maximum tensile strength of 368.76 N/mm 2. Response surface analysis carried out has revealed that transverse speed and rotational speed has high impact on the hardness and tensile strength respectively. The grains at the nugget zone were very fine and uni-axed improving their tensile strength.

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“…A lot of studies have been conducted using the numerical and analytical methods which have investigated its different aspects. In the literature (Zhang, 1999;Dong, 2001;Hadipour, 2011;MasoudiNejad, 2015Moghadam, 2016), some of these issues are studied using some experimental observation, analytical calculations and FEA calculations within various contexts. Most of the previous studies described above have investigated the fatigue behavior of the metallic welded specimens is a discussion which has not been noticed very much.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Strength and Fatigue Fracture Mechanism for Spot Welds in U-Shape Specimens

Shariati

Nejad

2016

Lat. Am. j. solids struct.

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In this paper, the fatigue behavior of the metallic welded U-shape specimens subjected to cyclic loading have been investigated via experimental and numerical analysis. To do so, two sets of the spot welded specimens with different sizes were prepared and fatigue tests were conducted under the various cyclic loads. The crack propagation is numerically examined by using the stress intensity factor values achieved from FE analyses. The modified Paris and Forman-Newman-De Koning models were used to estimate the fatigue crack growth rate. The results indicate that the fatigue life of specimens decreases with any increase in load level.

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Microstructure and Residual Stress Distributions Under the Influence of Welding Speed in Friction Stir Welded 2024 Aluminum Alloy

Cited by 52 publications

References 36 publications

Effect of the energy input on the microstructure and mechanical behavior of AA2024-T351 joint produced by friction stir welding

Effect of the energy input on the microstructure and mechanical behavior of AA2024-T351 joint produced by friction stir welding

Interfacial Microstructure Analysis of AA2024 Welded Joints by Friction Stir Welding

Fatigue Strength and Fatigue Fracture Mechanism for Spot Welds in U-Shape Specimens

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