Analysis of AA 6082-T6 welds strength mismatch: stress versus hardness relationships

Costa, Mara; Rodrigues, D.M.; Leitão, C.

doi:10.1007/s00170-015-6866-z

Cited by 29 publications

(7 citation statements)

References 65 publications

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“…After examining the hardness plots displayed in Figure 5 , it could be concluded that the change in processing parameters did not have a relevant effect on this attribute. The hardness profile measured over the aluminum line (which only covers the aluminum side of the joint) evidenced a W shape that was also observed by several authors [ 44 , 45 , 46 ]. This shape is a characteristic associated with heat-treatable aluminum alloys, such as the present case, when subjected to friction stir processes [ 44 ].…”

Section: Resultssupporting

confidence: 82%

Thermo-Mechanical Characterization of Metal–Polymer Friction Stir Composite Joints—A Full Factorial Design of Experiments

Correia,

Gaspar,

Cipriano

et al. 2024

Polymers

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With the increasing demand for lighter, more environmentally friendly, and affordable solutions in the mobility sector, designers and engineers are actively promoting the use of innovative integral dissimilar structures. In this field, friction stir-based technologies offer unique advantages compared with conventional joining technologies, such as mechanical fastening and adhesive bonding, which recently demonstrated promising results. In this study, an aluminum alloy and a glass fiber-reinforced polymer were friction stir joined in an overlap configuration. To assess the main effects, interactions, and influence of processing parameters on the mechanical strength and processing temperature of the fabricated joints, a full factorial design study with three factors and two levels was carried out. The design of experiments resulted in statistical models with excellent fit to the experimental data, enabling a thorough understanding of the influence of rotational speed, travel speed, and tool tilt angle on dissimilar metal-to-polymer friction stir composite joints. The mechanical strength of the composite joints ranged from 1708.1 ± 45.5 N to 3414.2 ± 317.1, while the processing temperature was between 203.6 ± 10.7 °C and 251.5 ± 9.7.

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Section: Resultssupporting

confidence: 82%

Thermo-Mechanical Characterization of Metal–Polymer Friction Stir Composite Joints—A Full Factorial Design of Experiments

Correia,

Gaspar,

Cipriano

et al. 2024

Polymers

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“…(2021a) used nanoindentation techniques to investigate mechanical properties of different regions in the stir zone. For the hardness measurement, it converts microhardness into strength of a local region in the weld and a couple of functions have been mentioned in the literature (Costa et al. , 2015; Keist and Palmer, 2017; Stathers et al.…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al (2021a) used nanoindentation techniques to investigate mechanical properties of different regions in the stir zone. For the hardness measurement, it converts microhardness into strength of a local region in the weld and a couple of functions have been mentioned in the literature (Costa et al, 2015;Keist and Palmer, 2017;Stathers et al, 2014;Sato et al, 2001). Regrettably, the relationship between strength and microhardness has been empirically proved by fitting experimental data in specific tests, but the generality of the functions has not been corroborated.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous deformation of friction stir welded aluminum alloy 6061 in tension and high cycle fatigue

DAI

Liu

Zhan

et al. 2022

IJSI

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PurposeThe investigations provide a basis for the optimization of the alloy 6061-T6 friction stir welding (FSW) process to improve the mechanical properties of welded joints.Design/methodology/approachThe local deformation of the FSW joint in tension and fatigue test were experimentally investigated by digital image correlation (DIC) technique.FindingsThe local stress-strain behaviors of the sub-regions show that the plastic strain always concentrated at the heat affected zone (HAZ) on the advancing side both in tension and high cycle fatigue and eventually leads to the final fracture. The evolution of the plastic strain at very low stress is extremely slow and accounts for most of the total fatigue life. However, the local deformation exhibits a sudden increase just before the fatigue failure.Originality/valueBased on the experimental data, the result indicates that the HAZ is the weakest zone across the weld and the strain localization in high cycle fatigue is very harmful and unpredictable for the FSW joints.

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“…Proper modelling of the phase change of the material during heating and cooling is a challenging task, further complicating the use of the thermo-mechanical FEA in creating the material model of HAZ. The last approach is to test the welded coupon specimen with a butt weld in the middle transverse to the tensile loading direction [16][17][18][19][20][21][22][23][24][25]. It is essential to use the digital image correlation (DIC) technique since the local deformation in each region of the welded coupon specimen should be measured.…”

Section: Introductionmentioning

confidence: 99%

A Method for Determining the Constitutive Model of the Heat-Affected Zone Using Digital Image Correlation

Yan¹,

Xin²,

Yang³

et al. 2021

SSRN Journal

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Analysis of AA 6082-T6 welds strength mismatch: stress versus hardness relationships

Cited by 29 publications

References 65 publications

Thermo-Mechanical Characterization of Metal–Polymer Friction Stir Composite Joints—A Full Factorial Design of Experiments

Thermo-Mechanical Characterization of Metal–Polymer Friction Stir Composite Joints—A Full Factorial Design of Experiments

Heterogeneous deformation of friction stir welded aluminum alloy 6061 in tension and high cycle fatigue

A Method for Determining the Constitutive Model of the Heat-Affected Zone Using Digital Image Correlation

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