Microstructure and anisotropic mechanical behavior of friction stir welded AA2024 alloy sheets

Zhang, Zhihan; Li, Wenya; Li, Jinglong; Chao, Yuh J.; Vairis, Achilles

doi:10.1016/j.matchar.2015.06.039

Cited by 24 publications

(3 citation statements)

References 37 publications

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“…H. Takahashi et al [ 14 ] compared the evolution of plastic anisotropy of Al alloy plates by evaluating the flow stress of the tensile test in various directions and showed that unstable lattice rotation would cause the anisotropy to become sharper. Zhang et al [ 15 ] investigated the difference in mechanical properties of 2024 plate welded joints; Fourmeau et al [ 16 ] analyzed the plastic anisotropy of AA7075-T651 Al alloy in different directions; El-Aty et al [ 17 ] revealed the deformation behavior, strengthening mechanism and anisotropy of Al-Li alloy. These tests showed that the anisotropy of the mechanical properties was related to the shape and orientation of the grains.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Low Cycle Behavior of the Extruded 7075 Al Alloy

Wang

Yang

et al. 2021

Materials

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The quasi-static and low cycle fatigue tests of extruded 7075 Al alloy (Φ200 mm) were investigated in three directions: the extrusion direction (ED), the radial direction (RD), and 45° with ED (45°). Grain morphology analysis, texture measurement, and fatigue fracture characterization were conducted to discuss the relationship between microstructure and mechanical properties. The experimental results showed that the ED specimen had higher ultimate tensile strength (UTS) and low cycle fatigue (LCF) properties, which were mainly attributed to the following three causes. First, the grain boundaries (GBs) had an obvious effect on the crack growth. The number of GBs in the three directions was different due to the shape of the grains elongated along the ED. Second, the sharp <111> texture and the small Schmidt factor along the ED explained the higher ultimate tensile strength (UTS) of the ED specimens. Third, fatigue fracture observation showed that the ED specimen had a narrow fatigue striation spacing, which indicated that the plastic deformation of the ED specimen was the smallest in each cycle. In addition, two fatigue prediction models were established to predict the LCF life of extruded 7075 Al alloy, based on the life response behavior of the three directions under different strains.

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Section: Introductionmentioning

confidence: 99%

Anisotropic Low Cycle Behavior of the Extruded 7075 Al Alloy

Wang

Yang

et al. 2021

Materials

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“…Similar observations were made by Jones et al [18] in friction stir welded 2024-T351 alloy. Zhang et al [19] found that anisotropy in microstructure of friction stir welded 2024-T3 was responsible of difference in mechanical properties. Material ow behavior in the welds has also been addressed by many researchers such as Huaxia et al [20] studied the material ow behavior of friction stir welded 2024-T351 with the help of thin copper strips.…”

Section: Introductionmentioning

confidence: 99%

Assessment of microstructure and mechanical properties of friction stir welded AA2014-O and AA2014-T6 sheets

Muhammad

Husain

Tauqir

et al. 2021

Int J Adv Manuf Technol

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In this study, friction stir welding of AA2014-O and AA2014-T6 aluminum alloy was performed at various welding speeds to evaluate the in uence of temper conditions of base metal on the properties of the welded joints. The results showed strong in uence of base metal temper conditions on the microstructural morphologies and mechanical behavior of the welded joints. In the 2014-O joints, different zones of weld joint were diffused into each other and there was no clear interface between them. In 2014-T6 joints, there was a distinct demarcation between the NZ, TMAZ, HAZ and base metal. The welded joints in 2014-O temper condition showed increase in hardness in the vicinity of weld center due to grain re nement whereas, in 2014-T6, softening occurred in the same region by the dissolution of strengthening precipitates. The mechanical properties of 2014-O joints were equivalent to the base metal showing a 100% weld e ciency with fracture located in the base metal, whereas 2014-T6 welds exhibited about 70% weld e ciency with fracture located at the NZ/TMAZ interface. All the samples in mechanical testing fractured at retreating side (RS) which exhibited heterogeneity in the mechanical properties of the welded joints. SEM fractographic analysis revealed a ductile fracture mode comprising of dimples in both temper conditions. The size and shape of the dimples was strongly dependent on base metal temper condition.

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“…Some factors are affecting the mechanical anisotropy of Al-Cu-Mg alloys, such as grain morphology, texture, dislocation density, and the distribution and density of precipitates. [10] Moreover, numerous studies have shown that the component and texture intensity exert a significant effect on the plane anisotropy of the alloy sheets. [11] Singh et al [12] found that the density of brass texture was significantly weakened using large strain cross rolling, and the deviation of mechanical properties anisotropy in different directions was less than 3%.…”

Section: Introductionmentioning

confidence: 99%

The Improved Mechanical Anisotropy of a Commercial Al–Cu–Mg–Mn–Si (2017) Aluminum Alloy by Cross rolling

Huang

Jiang

et al. 2021

Adv Eng Mater

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The optimized thermomechanical process is an effective way to improve and control the properties of metallic alloys. Herein, the influence of unidirectional cold rolling and cross cold rolling on the texture and mechanical properties of a commercial Al─Cu─Mg─Mn─Si (2017) alloy is investigated. The Al sheets successfully prepared by the three cold rolling methods have different dominant texture components, and show different texture transformation routes during solution and aging treatments. In addition, the influence of the rolling direction on the texture of the 2017 alloy is discussed. The cross-rolled sheets subjected to artificial aging show the strongest yield strength of %366 MPa and ultimate tensile strength of %426 MPa, as well as excellent mechanical anisotropy. Its in-plane anisotropy (IPA), r, and Δr values are 0.7%, 0.576, and 0.042, respectively. The effects of texture and precipitates on the anisotropy of aged 2017 alloys are also discussed separately. This work may help to understand the relationship between rolling direction and the mechanical anisotropy of aluminum alloys and provide a basis for industrial production.

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Microstructure and anisotropic mechanical behavior of friction stir welded AA2024 alloy sheets

Cited by 24 publications

References 37 publications

Anisotropic Low Cycle Behavior of the Extruded 7075 Al Alloy

Anisotropic Low Cycle Behavior of the Extruded 7075 Al Alloy

Assessment of microstructure and mechanical properties of friction stir welded AA2014-O and AA2014-T6 sheets

The Improved Mechanical Anisotropy of a Commercial Al–Cu–Mg–Mn–Si (2017) Aluminum Alloy by Cross rolling

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