Comparison of the Weldability of AA6061-T6 Joint under Different Friction Stir Welding Conditions

Abdollah-zadeh, A.; Bagheri, Behrouz; Abassi, Mahmoud; Kokabi, A.H.; Moghaddam, Ahmad Ostovari

doi:10.1007/s11665-020-05379-4

Cited by 86 publications

(24 citation statements)

References 54 publications

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“…e tool being nonconsumable is the major factor for deciding the temperature differential in the operation. Variable weld speed and pipe speed (workpiece) are chosen based on preliminary experiments [6,10,14]. e tool is made of AISI M2 tool steel, whose dimensional details are listed in Figure 5.…”

Section: Tool and Workpiece For Friction Stir Weldingmentioning

confidence: 99%

“…Excessive temperature differential occurring in the dry FSW process leads to metastable precipitates that cause a drop in the hardness in the weld region [3,4,10]. An immediate remedy is found in the cryogenic FSW process due to the fine structures occurring in the region, thus creating a brittle transition region along the weld area [5].…”

Section: Ramification Of Microhardness In Fsw Of Aluminiummentioning

confidence: 99%

“…Major benefits of availing the FSW process is (i) limited weld defects, (ii) addressing aluminium welding capability (difficult to weld material classification for aluminium), and (iii) way better dimensional capability if the process occurs in a controlled manner. All these above are specific to FSW if the whole process is well maintained and run in an optimized condition [3][4][5][6][7][8]10]. In this method of joining materials, a nonconsumable tool pin profile generates friction heat by rotating between the parent material, as indicated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Even though the parent material remains in its solid state, drawbacks are ascertained in the line or region of welding as it undergoes high levels of deformation [6,10], causing an upsurge of unavoidable changes in the microstructure of the component leading to curtailment of mechanical properties [3,4], coupled with aggrandizement of tensile residual stress [3,[5][6][7]. To address these, postweld treatments were carried out, by aging, solution treatment, and room temperature welding (long range of time) [2,3,8,10]. ough posttreatments lead to a drop in the volume fraction of the residual tensile phase, microstructure changes are limited to the boundary lines; also, in terms of cost, time, and labour, it was considered to be laborious procedure physically and economically.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Dry and Cryogenic Friction Stir Welding of AA7075 Aluminium Alloy

Navukkarasan

Sundaram

Sastry

et al. 2021

Advances in Materials Science and Engineering

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An attempt has been made to investigate dry and cryogenic friction stir welding of AA 7075 aluminium alloy, which is predominantly availed in aerospace and defence component industries. These industries avail friction stir welding for joining two nonferrous materials, and minimal deviations and maximum strength are the preliminary and long time goal. A cryogenic friction stir welding setup was developed to conduct the joining of two aluminium alloy pipes. An increase of 0.76–42.93% and 3.79–31.24% in microhardness and tensile strength, respectively, is ascertained in cryogenic friction stir welding in correlation to dry friction stir welding of aluminium alloys. TOPSIS evaluation for the experimental run indicated tool profile stepped type, pipe rotation speed of 1000 rpm, welding speed of 50 mm/min, and axial force of 8 kN as close to unity ideal solution for dry and cryogenic friction stir welding of AA 7075 aluminium alloys. The friction stir-welded component under the cryogenic environment showcased drop in temperature, curtailed surface roughness, and fine grain structure owing to reduction in temperature differential occurring at the weld zone. A curtailment of 50.84% is ascertained in the roughness value for cryogenic friction stir welding in correlation to dry friction stir welding of AA 7075 alloy. A decrement of 21.68% is observed in the grain size in the cryogenic condition with correlation to the dry FSW process, indicating a drop in the coarse structure. With the curtailment of grain size and drop in temperature differential, compressive residual factor and corrosion resistance attenuated by 40.14% and 67.17% in the cryogenic FSW process in correlation to the dry FSW process, respectively.

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Section: Tool and Workpiece For Friction Stir Weldingmentioning

confidence: 99%