Mechanical and metallurgical properties of dissimilar AA6061-T6 and AA7277-T6 joint made by FSW technique

Aliha, M.R.M.; Shahheidari, M.; Bisadi, M.; Akbari, Mostafa; Hossain, S

doi:10.1007/s00170-016-8341-x

Cited by 60 publications

(32 citation statements)

References 21 publications

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“…For example, the bi‐metal joints of AA6061/AA7075, AA5083‐H111/AA6351‐T6, and AA5086‐H116/AA5083‐H321 have been fabricated in Guo et al, Palanivel et al, and Kundu and Singh, respectively, to investigate the influence of FSW input parameters on the microstructure and mechanical properties of dissimilar aluminum weldments with different grades. Aliha et al optimized the process parameters of a bi‐material dissimilar Al‐Al (ie, 5xxx and 6xxx series) joint welded by the FSW. They employed artificial neural network method for multi‐objective optimization of microhardness and tensile strength of the butt joint, simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Fracture analysis of dissimilar Al‐Al friction stir welded joints under tensile/shear loading

Torabi

Kalantari

Aliha

2018

Fatigue Fract Eng Mat Struct

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In this research, fracture of dissimilar friction stir welded (FSWed) joint made of Al 7075‐T6 and Al 6061‐T6 aluminum alloys is investigated in the cracked semi‐circular bend (CSCB) specimen under mixed mode I/II loading. Due to the elastic‐plastic behavior of the welded material and the existence of significant plastic deformations around the crack tip at the propagation instance, fracture prediction of the FSWed specimens needs some failure criteria in the context of the elastic‐plastic fracture mechanics which are very complicated and time‐consuming. For this purpose, the Equivalent Material Concept (EMC) is used herein by which the tensile behavior of the welded material is equated with that of a virtual brittle material. By combining EMC with the 2 brittle fracture criteria, namely the maximum tangential stress (MTS) and mean stress (MS) criteria, the load‐carrying capacity (LCC) of the FSWed CSCB specimens is predicted. Comparison of the experimental results and theoretical predictions from the 2 criteria showed that both criteria could accurately predict the LCC of the cracked specimens. Moreover, as the contribution of mode II loading increases, the size of the plastic region around the crack tip at failure increases, leading to increasing the LCC.

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Section: Introductionmentioning

confidence: 99%

Fracture analysis of dissimilar Al‐Al friction stir welded joints under tensile/shear loading

Torabi

Kalantari

Aliha

2018

Fatigue Fract Eng Mat Struct

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“…Welding technology, joining method, and the effect of process parameters on mechanical properties are very important to predict the fatigue life of welded structures. A review of the above‐mentioned aspects of welding can be found in previous studies …”

Section: Introductionmentioning

confidence: 99%

Fatigue surface crack propagation and intersecting cracks in connection with welding residual stresses

Chernyatin

Matvienko

Razumovsky

2018

Fatigue Fract Eng Mat Struct

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The effect of welding residual stress on surface fatigue crack propagation and fracture mechanics parameters of intersecting orthogonal cracks is discussed. The effect of welding residual stresses on fatigue propagation of the internal surface crack is analysed in the case of welded joint of the pipeline. To predict fatigue crack propagation, the modified Forman law taking into account the nonsingular T‐stress as the crack‐tip constraint has been employed. It is shown by means of numerical simulation (the software ANSYS and MATLAB) that welding residual stress and crack‐tip constraint effects lead to the semielliptical form of final configuration of the surface fatigue crack. Fracture mechanics parameters for intersecting surface cracks, namely, circular and semielliptical cracks in welded joint of the pipeline are also analysed by numerical simulation. It was concluded that welding residual stress intensifies the effect of intersecting orthogonal surface cracks on fracture mechanics parameters including the crack‐tip constraint.

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“…Friction stir lap welding of dissimilar alloys such as Al-to Al, Al-to-steel, Al-to-Ti or Al-to-Cu is also of enormous significance in many industries and many research activities have been done for investigating such dissimilar weldments (Abdollah-Zadeh et al, 2008;Akbari et al, 2016;Aliha et al, 2016Aliha et al, , 2017Aonuma & Nakata, 2011;Jiang & Kovacevic; In this paper, we focus on an example of friction stir lap welding (FSLW) of one metallic alloy to another with considerably higher melting temperature -FSLW of Al-steel and Al-Ti. It is well known that fusion welding of Al-to-steel and AlTi is very challenging (Taban et al, 2010;Liedl et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Microstructure and fracture behavior of friction stir lap welding of dissimilar metals

Shubhavardhan¹,

Surendran²

2018

10.5267/j.esm

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Friction Stir Welding (FSW) is a relatively new solid state joining technique which is used not only for joining the aluminum and its alloys but also has potential for joining dissimilar materials with very different physical and mechanical properties which are hard to weld using conventional fusion welding processes. Tensile shear testing is used to determine the Mechanical strength of friction stir lap (FSL) welds under static loading, fracture strength (σLap) corresponding to the maximum load in a test over the sample width is widely used as the strength value. During friction stir lap welding (FSLW) of dissimilar metals with large differences in melting temperatures, a metallurgical bond is established through the formation of interfacial intermetallic compounds. However, as these intermetallic compounds are generally believed to be brittle with little ductility, they are generally considered to have detrimental effect on fracture strength. The aim of the present research is to study how the interface structure is affected by FSW parameters and how the formation of interface structure affects fracture of Al-Steel and Al-Ti FSL welds.

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Mechanical and metallurgical properties of dissimilar AA6061-T6 and AA7277-T6 joint made by FSW technique

Cited by 60 publications

References 21 publications

Fracture analysis of dissimilar Al‐Al friction stir welded joints under tensile/shear loading

Fracture analysis of dissimilar Al‐Al friction stir welded joints under tensile/shear loading

Fatigue surface crack propagation and intersecting cracks in connection with welding residual stresses

Microstructure and fracture behavior of friction stir lap welding of dissimilar metals

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