An Experimental Investigation of Temperature Distribution and Joint Properties of Al 7075 T651 Friction Stir Welded Aluminium Alloys

Shah, Pratik H.; Badheka, Vishvesh J.

doi:10.1016/j.protcy.2016.03.061

Cited by 44 publications

(17 citation statements)

References 17 publications

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“…e model used decoupled simulation in which the thermal history was first captured and then applied as a load to calculate consequent stresses. Salloomi and Al-Sumaidae [10] implemented a 3D finite element simulation to validate the temperature results of Shah and Badheka [4]. Although the finite element results were in good convergence with the experimental results in both plunging and dwell phases, there was some divergence in the traverse and cooling phases.…”

Section: Introductionmentioning

confidence: 97%

“…However, the study did not explain important quantities that affect plastic deformation such as plastic strain and dissipation energies during FSW process. To follow up, Shah and Badheka [4] conducted an experimental study to capture the temperature history during different phases of AA 7075-T651 FSW process and investigate its effect on the final microstructure. Although the study measured the transient temperature variation around the rim of the tool shoulder, it was challenging to have some information about the temperature variation beneath the shoulder area or along the weld line.…”

Section: Introductionmentioning

confidence: 99%

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Temperature and Stress Evaluation during Three Different Phases of Friction Stir Welding of AA 7075-T651 Alloy

Salloomi

Hussein

Al-Sumaidae

2020

Modelling and Simulation in Engineering

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The current study performs an explicit nonlinear finite element simulation to predict temperature distribution and consequent stresses during the friction stir welding (FSW) of AA 7075-T651 alloy. The ABAQUS® finite element software was used to model and analyze the process steps that involve plunging, dwelling, and traverse stages. Techniques such as Arbitrary Lagrangian–Eulerian (ALE) formulation, adaptive meshing, and computational feature of mass scaling were utilized to simulate sequence events during the friction stir welding process. The contact between the welding tool and workpiece was modelled through applying Coulomb’s friction model with a nonlinear friction coefficient value. Also, the model considered the effect of nonlinear material properties as well as heat transfer conditions such as heat losses due to convection and thermal contact conductance between the workpiece and the backing plate interface on the thermal history. To validate the computational model results, an experimental procedure was carried out to measure temperature history on both sides of the specimen as well as the plunging force throughout the whole process time. The results obtained showed that symmetrical temperature distribution throughout the workpiece width was distinguished, implying that the tool rotation has a minor effect on the final temperature distribution. In addition, asymptotic V shape with high gradient temperature value in the weld nugget region after the full plunging was distinguished. Mechanical stresses and related plastic deformations generated, while achieving the FSW samples were evaluated in addition to the tool reaction force and heat generated to protect against tool failure.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Temperature and Stress Evaluation during Three Different Phases of Friction Stir Welding of AA 7075-T651 Alloy

Salloomi

Hussein

Al-Sumaidae

2020

Modelling and Simulation in Engineering

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“…The creation of mixed flow region determined the quality (strength, absence of defects) of the welds and was mostly affected by the pin profile, the welding, and the rotational speed [7,8]. Moreover, the thermal distribution and the residual stresses after friction stir welding have significant effect in mechanical behavior and weld quality [9,10].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and mechanical properties of dissimilar friction stir welds between AA6082-T6 and AA7075-T651

Daniolos

Pantelis

2016

Int J Adv Manuf Technol

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In the present work, similar and dissimilar friction stir welds have been produced on 6-mm-thick plates of AA6082-T6 and AA7075-T651. The microstructural characteristics and the mechanical response of both similar and dissimilar welds were investigated aiming to determine the major differences between them. Material mixing of the dissimilar weld nugget, which was created after the welding process, was studied in order to determine the produced different areas and their dominant alloying elements in this zone. Microstructural investigation was made in the welding zones of similar and dissimilar friction stir welds and indications of partial dynamic recrystallization were observed in the thermomechanically affected zone of the similar welds. Transverse and longitudinal microhardness distributions determined the heat affected zone as the weaker area in the welded specimen. After tensile testing, the fracture of the similar and the dissimilar welds at heat affected zone demonstrated the good bonding and weld quality of the similar and dissimilar weld nuggets.

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“…As shown in Figure 4a and Table 3, the maximum values of the thermal histories for A 1 , A 3 and A 5 , which correspond to the starting stage, middle stage and ending stage respectively, are 328 • C, 343 • C and 380 • C in the conventional FSW process. While the peak values measured at R 1 , R 3 and R 5 are 289 • C, 333 • C, 375 • C. Such a temperature field is commonly found during the FSW process [23,[38][39][40][41]. The distinctions of the peak temperature along the welding direction (WD) are even still presented when the heat pipe is applied in the FSW process, as well as the differences of the temperatures along the transverse direction (the direction perpendicular to the welding direction on the welded plates, which is often abbreviated as TD) [42].…”

Section: Measurement Of Hardnessmentioning

confidence: 83%

Refined Microstructure and Enhanced Hardness in Friction Stir-Welded AZ31 Magnesium Alloy Induced by Heat Pipe with Different Cooling Liquid

Zhang

Chen

et al. 2019

Metals

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The temperature field in welded plates has a significant influence on the microstructure and thereby their properties during friction stir welding (FSW). In this work, a self-designed heat pipe with different cooling liquid was applied in the FSW process for AZ31 magnesium alloy. The temperature fields, microstructures and properties of the welded joints were investigated. The peak temperatures and the durations of high temperature at both the advancing side and the retreating side decrease during the FSW process after applying the heat pipe and adding the ambient temperature water in the condensing tank. The top part of the weld nugget zone of the joint shows a significant decrease as well as its middle part due to the cooling effect of the heat pipe. The microstructure of the weld nugget zone is refined, associated with the increase in the hardness after applying the heat pipe. When the cooling liquid turns into ice water, grains in the weld nugget zone become significantly smaller and have a more homogeneous size. The mean value of hardness increases and the corresponding deviation is declined. Therefore, these results indicate that the application of the heat pipe and the employment of ice water as the cooling liquid can further refine the microstructure and enhance the strength of the material.

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An Experimental Investigation of Temperature Distribution and Joint Properties of Al 7075 T651 Friction Stir Welded Aluminium Alloys

Cited by 44 publications

References 17 publications

Temperature and Stress Evaluation during Three Different Phases of Friction Stir Welding of AA 7075-T651 Alloy

Temperature and Stress Evaluation during Three Different Phases of Friction Stir Welding of AA 7075-T651 Alloy

Microstructural and mechanical properties of dissimilar friction stir welds between AA6082-T6 and AA7075-T651

Refined Microstructure and Enhanced Hardness in Friction Stir-Welded AZ31 Magnesium Alloy Induced by Heat Pipe with Different Cooling Liquid

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