Effect of tool parameters on mechanical properties, temperature, and force generation during FSW

Akbari, Mostafa; Aliha, M.R.M.; Keshavarz, Sme; Bonyadi, A

doi:10.1177/1464420716681591

Cited by 42 publications

(33 citation statements)

References 26 publications

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“…Dealing with the FSW process, most of the previous research works are focused on linear welding of plates (such as lap, butt and T‐joint welds) for different alloys 3–15 . However, reliable and practical usage of this technique for joining cylinders, pipes and tubes requires a suitable and optimized orbital FSW on cylindrical shells.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and fracture properties of aluminium cylinders manufactured by orbital friction stir welding

Aliha

Ghoreishi

Imani

et al. 2020

Fatigue Fract Eng Mat Struct

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Butt welding of AA6063 aluminium cylindrical shells was performed using the orbital friction stir welding (FSW) method. Tool rotation speed and orbital speed (i.e., traverse speed of rotating cylinder during welding) were considered as variable, and the strength and the mechanical properties including tensile strength, microhardness, mode I fracture energy and mode I crack growth behaviour of manufactured cylinders were investigated experimentally. A novel and subsized test specimen was designed and manufactured for fracture testing of specimens extracted from both base metal and weld zone region of cylinders. The initial precrack was introduced along (i) the tool penetration through the pipe thickness (i.e., T-direction) and (ii) along the tool travelling direction (i.e., L-direction). It was found that the crack growth resistance and fracture energy values of FSW samples are greater than the corresponding values of base aluminium material along both "L"and "T"-directions. Also, the fracture resistance value in T-direction was higher than the L-direction for the whole tested FSW samples with different welding speeds. K E Y W O R D Scylinder butt joining, mechanical and microstructure properties, novel mode I fracture test specimen, orbital FSW, welding speeds

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Section: Introductionmentioning

confidence: 99%

Mechanical and fracture properties of aluminium cylinders manufactured by orbital friction stir welding

Aliha

Ghoreishi

Imani

et al. 2020

Fatigue Fract Eng Mat Struct

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show abstract

“…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%

“…A review of the above-mentioned aspects of welding can be found in previous studies. [1][2][3][4][5][6] The welding process is accompanied by a change in the microstructure of the material and the appearance of residual stress. The residual stress as well as the microstructural change has a significant combined effect on fatigue crack propagation (eg, Fratini et al 7 ).…”

mentioning

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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Effect of tool parameters on mechanical properties, temperature, and force generation during FSW

Cited by 42 publications

References 26 publications

Mechanical and fracture properties of aluminium cylinders manufactured by orbital friction stir welding

Mechanical and fracture properties of aluminium cylinders manufactured by orbital friction stir welding

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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