Achieving equal fatigue strength to base material in a friction stir welded 5083-H19 aluminium alloy joint

Wang, Baibin; Xue, P.; Xiao, B.L.; Wang, W. G.; Liu, Y. D.; Y., Z.

doi:10.1080/13621718.2019.1630571

Cited by 21 publications

(19 citation statements)

References 43 publications

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“…Apart from this, the hardness in NZ is more significant than which is obtained in HAZ and TMAZ, and smaller hardness value was obtained at the boundary between the HAZ and TMAZ. 22 As the TRS, WS increased, higher hardness is obtained with a narrower TZ. It is suggested that aluminum alloy produces w-shaped hardness profile.…”

Section: Mechanical Propertiesmentioning

confidence: 95%

Microstructure and mechanical properties of interlock friction stir weld lap joint AA7475-T7 using fractional factorial design

Anand

Sridhar

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Friction stir welding (FSW) technique was preliminary developed to join various low strength and high strength alloys by considering different inputs and known to surpass the flaws which occur in conventional welding processes. The present study is focused on the FSWed interlock lap joint of AA7475-T7 using three-level three factor (33) full factorial design methodology to study the correlation among process parameters with the lap shear strength and hardness. To compare the strength and hardness of interlock lap joint, a typical lap joint has been made with an optimized input parameter obtained from the FSW interlock lap joint. Microstructure analysis, hardness and tensile strength of FSWed interlock lap joints and typical lap joints were done to analyze the robustness of the welds made. Results proved that the strength of FSWed interlock lap joints is high compared to typical lap weld with a ultimate tensile strength of 172.88 N and hardness of 200 HV when the process parameter level is at tool rotation speed of 1400 r/min, welding speed 30 mm/s plunge speed rate 0.06 mm/s. At the tool rotation speed of 1400 r/min dynamic recrystallization of the material occurs which thereby leads to the formation of fine grains in the SZ of the weld metal.

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Section: Mechanical Propertiesmentioning

confidence: 95%

Microstructure and mechanical properties of interlock friction stir weld lap joint AA7475-T7 using fractional factorial design

Anand

Sridhar

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The fine precipitates of Mg 2 Si and the subsequent formation of smaller grains in the aluminium matrix are the reason for this high fatigue strength. Similarly, Wang et al [44] have done a research to achieve equal fatigue strength to base material in a friction stir welded 5083-H19 aluminium alloy joint. Authors achieved base material fatigue strength of about 200 MPa in the FSW plate after the careful fixing of the process parameters.…”

Section: Fatigue Behaviourmentioning

confidence: 99%

Friction stir processing of nanofiller assisted AISI 1010 steel-CDA 101 copper dissimilar welds: a strength factor approach

Giridharan¹,

Sevvel²,

Ramadoss³

et al. 2022

Metall. Res. Technol.

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In this research study the effects of adding nano fillers such as SiO2, graphene nanoplatelets (Gnps) and biochar on to the weld pool of dissimilar AISI-SAE 1010 Steel- CDA 101 copper were investigated. The main aim of this research study was to investigate the effect of adding ceramic and carbon rich secondary reinforcements on to the friction stir weld (FSW) pool of dissimilar metals and its relative outcomes. The mechanical properties such as tensile strength, yield strength, % of elongation, hardness and fatigue strength were investigated in the form of the strength factor approach. According to the results, the highest strength factor of 98 was obtained for welds made using Gnps of about 1.0 wt.% with constant axial load of 5 kN, traverse speed of 30 mm/min, rotational speed of 900 rpm, dwell time of 5 s and plunging depth of 0.2 mm. The highest tensile strength of 225 MPa and a fatigue strength of 168 MPa was noted for the weld using 2 wt.% Gnps in the weld pool. However, the biochar addition of 2.0 wt.% on to the weld bead positioned the second highest strength factor of 88 due to its solid lubricity. In all the welding processes, large doses of fillers produced undesirable strength factor values. The microstructure of both the weld and tool shows desirable effects for nanoparticle assisted welds. The HAZ and TMAZ grains were refined due to the inclusion of the nanoparticles. The result shows that naturally acquired biochar nanoparticles have the potential of replacing high cost nanofillers in joining metals with more than 85% close to the high cost fillers for the same output. These properties improved dissimilar copper-steel welded plate joints that could be used in automotive, defence, aerospace and structural applications.

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“…The BM has a relatively high fatigue strength of 140 MPa; however, the fatigue strength of both the 300-200 and 300-400 joints decreased to 110 MPa (78% of BM). The relationship between the maximum stress and number of cycles to failure under the condition of HCF can be fitted by the following Basquin equation [2,[46][47][48][49]:…”

Section: High-cycle Fatigue Propertiesmentioning

confidence: 99%

Enhanced Fatigue Properties of 2219 Al Alloy Joints via Bobbin Tool Friction Stir Welding

Wang

Zhang

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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In the present study, 2219-T87 Al alloy plates, 4 mm in thickness, were subjected to bobbin tool friction stir welding (BT-FSW) under relatively high welding speeds of 200 and 400 mm/min, with the aim to analyze the effect of welding speeds on fatigue properties of the joints. The results showed that the tension-tension high-cycle fatigue performance of the BT-FSW joints at room temperature was significantly enhanced compared to that of other joints of 2xxx series Al alloys counterparts. Particularly at a high welding speed of 400 mm/min, the fatigue strength of the joint reached 78% of the base material together with a high tensile strength of 311 MPa. It was found that the joint line remnants had no effects on the fatigue properties of the BT-FSW joints due to the elimination of root flaws under the action of the lower shoulder. Most of the samples with the welding speed of 200 mm/min failed at the thermo-mechanical zone (TMAZ) during fatigue tests, attributable to the coarsened grains and precipitates, but all of the samples with high welding speed of 400 mm/min randomly failed at the nugget zone due to the improved hardness value in the TMAZ.

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Achieving equal fatigue strength to base material in a friction stir welded 5083-H19 aluminium alloy joint

Cited by 21 publications

References 43 publications

Microstructure and mechanical properties of interlock friction stir weld lap joint AA7475-T7 using fractional factorial design

Microstructure and mechanical properties of interlock friction stir weld lap joint AA7475-T7 using fractional factorial design

Friction stir processing of nanofiller assisted AISI 1010 steel-CDA 101 copper dissimilar welds: a strength factor approach

Enhanced Fatigue Properties of 2219 Al Alloy Joints via Bobbin Tool Friction Stir Welding

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