Optimization and Characterization of the Friction Stir Welded Sheets of AA 5754-H111: Monitoring of the Quality of Joints with Thermographic Techniques

Filippis, Luigi Alberto Ciro De; Serio, Livia Maria; Palumbo, Davide; Finis, Rosa De; Galietti, Umberto

doi:10.3390/ma10101165

Cited by 31 publications

(17 citation statements)

References 27 publications

(40 reference statements)

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“…Since the process parameters play a key role in determining mechanical properties of the FSW weld, experimental techniques have been used to optimize the rotational speed and welding speed [92][93][94][95][96]. De Filippis et al [57] used Response Surface Methodology [58,59] to correlate the process parameters to the quality of the 5754-H111 aluminum FSW joint.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Gao

2018

Applied Sciences

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The application fields of friction stir welding technology, such as aerospace and transportation, has high safety requirements and fatigue is the dominant failure mode for weldments. It is of great significance to understand the fatigue properties of friction stir welded joints. This paper provides an overview of the fatigue mechanism, influencing factors, crack growth rate, and fatigue life assessment. It is found that the fatigue performance of friction stir welded joints can be affected by welding process parameters, test environment, stress ratio, residual stress, and weld defect. The optimized process parameters can produce high quality weld and increase the weld fatigue life. Laser peening is an effective post weld treatment to decrease fatigue crack growth rate and improve material fatigue life.

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Section: Experimental Techniquesmentioning

confidence: 99%

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Gao

2018

Applied Sciences

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“…The relationship between welding parameters and joint properties was the subject of many studies involving both experimental and simulation methods a.i. Artificial Neural Network [2,22,[38][39][40]. Properties such as microhardness and ultimate tensile strength of the joint strongly depend on parameters of the process which finds their reflection in the amount of heat affecting the welded material [41].…”

Section: Introductionmentioning

confidence: 99%

“…The joint properties are mainly determined by heat input of the process being a function of i.a. tool rotation speed and tool traverse speed [38,42]. Although the most commonly aluminum alloys used in industry were widely examined in terms of the parameters-properties relationship, publications on the Sc-containing aluminum alloys are still a significant research gap [1,2,5,10,33,38,40].…”

Section: Introductionmentioning

confidence: 99%

Research on the Friction Stir Welding of Sc-Modified AA2519 Extrusion

Kosturek

Śnieżek

Torzewski

et al. 2019

Metals

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The aim of this research was to investigate the effect of friction stir welding (FSW) parameters on microstructure and mechanical properties of Sc-modified AA2519 extrusion joints. The workpiece was welded by FSW in non-heat-treated condition with seven different sets of welding parameters. For each obtained joint macrostructure and microstructure observations were performed. Mechanical properties of joints were investigated using tensile test together with localization of fracture location. Joint efficiencies were established by comparing measured joints tensile strength to the value for base material. The obtained results show that investigated FSW joints of Sc-modified AA2519 in the non-heat-treated condition have joint efficiency within the range 87–95%. In the joints obtained with the lowest ratio of the tool rotation speed to the tool traverse speed, the occurrence of imperfections (voids) localized in the stir zone was reported. Three selected samples were subjected to further investigations consisting microhardness distribution and scanning electron microscopy fractography analysis. As the result of dynamic recrystallization, the microhardness of the base material value of 86 HV0.1 increased to about 110–125 HV0.1 in the stir zone depending on the used welding parameters. Due to lack of the strengthening phase and low strain hardening of used alloy the lack of a significantly softened zone was reported by both microhardness analysis and investigation of the fractured samples.

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“…Tong et al tested traditional FSW on a 1 mm aluminum alloy sheet [12]. The range of welding parameters and relevant mechanical properties were studied in existing work, which mainly focused on traditional FSW with a rotation speed lower than 1000 rpm [13,14].…”

Section: Introductionmentioning

confidence: 99%

Influences of Pin Shape on a High Rotation Speed Friction Stir Welding Joint of a 6061-T6 Aluminum Alloy Sheet

Zhou

Chen

Wang

et al. 2018

Metals

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In order to explore the influences of different pins on the weld based on the specialty of the aluminium alloy sheet welding, three kinds of pins were chosen to perform high rotation speed friction stir welding on a 1 mm thick 6061-T6 aluminium alloy in this study. The microstructure and mechanical properties of the joints were analysed at the same time. When the rotation speed was 11,000 rpm and the welding speed was 300 mm/min, more sufficient stirring and a better joint (the tensile strength reaches 87.2% of the base metal) can be obtained with the pin design of a quadrangular frustum pyramid. The pattern of the weld cross section was a “flat T” and no obvious “S curve” was found in nugget zone (NZ). Heat affected zone (HAZ) and thermo-mechanically affected zone (TMAZ) were also narrow. The results demonstrate that the proportion of low angle boundaries in each area of the weld is lower than that of traditional Friction Stir Welding (FSW). The grain size of NZ is significantly refined and the proportion of low angle boundaries is only 20.1%, which have improved the welding quality.

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Optimization and Characterization of the Friction Stir Welded Sheets of AA 5754-H111: Monitoring of the Quality of Joints with Thermographic Techniques

Cited by 31 publications

References 27 publications

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Research on the Friction Stir Welding of Sc-Modified AA2519 Extrusion

Influences of Pin Shape on a High Rotation Speed Friction Stir Welding Joint of a 6061-T6 Aluminum Alloy Sheet

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