Experimental and theoretical evaluations of thermal histories and residual stresses in dissimilar friction stir welding of AA5086-AA6061

Aval, Hamed Jamshidi; Serajzadeh, S.; Kokabi, A.H.

doi:10.1007/s00170-011-3713-8

Cited by 62 publications

(17 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Friction stir welding has been recently applied for joining the Cu alloys [14][15][16], Al alloys [17][18][19], and Ti alloys [20,21]. The obtained results presented an acceptable weld quality with applicable mechanical properties.…”

Section: Introductionmentioning

confidence: 79%

Study on the effects of friction stir welding process parameters on the microstructure and mechanical properties of 5086-H34 aluminum welded joints

Jamalian

Farahani

Givi

et al. 2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

In this study, the effects of tool rotational and traverse speeds on the mechanical properties and the microstructure of the friction stir welded joints from Al 5086-H34 were studied. Insufficient heat generation and inadequate metal transportation at very low rotational speed and high turbulence in the plasticized metal at very high rotational speed emerged tunnel and worm hole defects into the weldment. It was discovered that as rotational and traverse speed increased, the average grain size of the weldment decreased due to more dynamic recrystallization and amplified stirring effect. An increase in the rotational speed increased the ultimate tensile strength and microhardness of the specimens. At the best welding condition, by employing the rotational and traverse speeds of 1250 rpm and 80 mm/min, respectively, 51 % enhancement in the elongation and 8 % increase in the microhardness of the welded samples were obtained. Moreover, the ultimate tensile strength of this welded joint reached to 85 % of the base metal.

show abstract

Section: Introductionmentioning

confidence: 79%

Study on the effects of friction stir welding process parameters on the microstructure and mechanical properties of 5086-H34 aluminum welded joints

Jamalian

Farahani

Givi

et al. 2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…The main factor that influences the heat input is then changed from rotation speed to material shear stress, which finally leads to the relatively steady state of temperature evolution with rotation speed. The rotation speed generally dominates the heat generation during C-FSW, and the welding temperature is mostly found to be improved with increasing rotation speed [17][18][19]. The correlations between process parameters and welding temperatures in HRS-FSW are rarely documented in the published literature.…”

Section: Welding Thermal Cyclesmentioning

confidence: 98%

Effect of rotation speed on nugget structure and property of high rotation speed friction stir welded Al-Mn aluminum alloy

Zhang

Wang

et al. 2017

Int J Adv Manuf Technol

View full text Add to dashboard Cite

High rotation speed friction stir welding is a promising low-force welding technique that enables the application of friction stir welding on in situ fabrication and repair. High rotation speed friction stir welding experiments (above 3000 rpm) were conducted on an Al-Mn aluminum alloy. The effect of rotation speed on nugget structure and property was investigated in order to illuminate the process features. The results indicate that a notable increase of nugget size occurs at high rotation speeds of 5000-8000 rpm. With increasing rotation speed, the thermal effect is firstly strengthened and then achieves a steady state. The microstructure evolution is more sensitive to welding temperature as rotation speed varies, and thus, the evolution trends of nugget structure morphology (grain size and substructure distribution density) with rotation speed resemble that of welding temperature. Increasing rotation speed above 4000 rpm effectively improves the nugget hardness due to the enhancement of strain hardening.

show abstract

“…The thermal cycles during FSW play a crucial role in the deformation. In recent years, research on the thermal cycles of FSW has mainly focused on medium and thick plates [7][8][9]. However, there is little research on the thermal cycles for FSW of ultrathin sheets.…”

Section: Introductionmentioning

confidence: 99%

Thermal Cycles and Deformation Characters During High-Speed Micro Friction Stir Welding Process of AA7075-T6 Sheets

Mao

Qin

et al. 2019

Metals

View full text Add to dashboard Cite

Thermal cycles and deformations during high-speed micro friction stir welding (μFSW) under different welding conditions were studied by experimental methods. The results show that the peak temperature and elevated-temperature exposure time (t150) increased with the increasing of rotational speed and decreased with the increasing of welding speed. Increasing rotational speed or welding speed led to an increase in both heating and cooling rates. The joint fabricated by the pinless tool experienced a lower peak temperature, a shorter elevated-temperature exposure time, and a larger temperature gradient than that by the pin tool. The welded sheet presented an anti-saddle deformation character, with convex bending in a longitudinal direction and concave angular bending in a transverse direction. In comparison to the pin tool, the longitudinal maximum bending deformation, Zmax, of the joint fabricated by the pinless tool was reduced by 12.35%, and the transverse angular deformation, α, was reduced by 6.67%. In comparison to the steel backing plate, the Zmax of the joint produced using a copper backing plate was reduced by 40.66%, but the α was increased by 53.27%.

show abstract

Experimental and theoretical evaluations of thermal histories and residual stresses in dissimilar friction stir welding of AA5086-AA6061

Cited by 62 publications

References 14 publications

Study on the effects of friction stir welding process parameters on the microstructure and mechanical properties of 5086-H34 aluminum welded joints

Study on the effects of friction stir welding process parameters on the microstructure and mechanical properties of 5086-H34 aluminum welded joints

Effect of rotation speed on nugget structure and property of high rotation speed friction stir welded Al-Mn aluminum alloy

Thermal Cycles and Deformation Characters During High-Speed Micro Friction Stir Welding Process of AA7075-T6 Sheets

Contact Info

Product

Resources

About