Effect of tool geometry on mechanical and microstructural behaviours in dissimilar friction stir welding of AA 5086–AA 6061

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

doi:10.1179/1362171811y.0000000044

Cited by 46 publications

(35 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to the hardness profile measured at 2 h after FSW, the increase in the hardness is noticeable at 168 h within the SZ and TMAZ of the AA6061 side however, no obvious changes were observed in other regions. This behavior in the SZ and TMAZ of the AA6061 side is due to reprecipitation after natural aging [16]. Figure 7b also shows the hardness profile measured at a depth of 2 mm from the root face in the samples welded with 840 rpm, 150 mm/min and 900 rpm, 100 mm/min after 168 h natural aging and related TEM bright field images of different zones of the sample 900 rpm, 100 mm/min are shown in Fig.…”

Section: Resultsmentioning

confidence: 92%

A study on microstructures and residual stress distributions in dissimilar friction-stir welding of AA5086–AA6061

et al. 2012

View full text Add to dashboard Cite

Dissimilar friction stir welds of aluminum alloys AA5086 in annealed and AA6061 in T6 temper conditions were investigated in terms of residual stress, grain structure and precipitation distribution in different zones of the welded joints. Optical metallography and transmission electron microscopy were used to characterize microstructures of different zones of the welds. In addition, residual stress profile and local mechanical properties of different zones were evaluated employing X-ray diffraction method and digital image correlation technique. It was found that softening in the AA6061-T6 side occurs in regions with weld peak temperature higher than 300°C. The micro-hardness profile results and TEM investigations also showed that thermo-mechanical affected zone of AA6061 side with large plate-shaped b precipitates is the softest region of the joints in AA6061 side. Furthermore, residual stress distribution within the samples is not directly dependent on the local mechanical properties of different zones of the joints.

show abstract

Section: Resultsmentioning

confidence: 92%

A study on microstructures and residual stress distributions in dissimilar friction-stir welding of AA5086–AA6061

et al. 2012

View full text Add to dashboard Cite

show abstract

“…[14][15][16] Residual stress can provide enough driving force for the initiation and propagation of cracks that might lead to the failure in service. [17,18] An extensive body of literature has been published on the viability of FSW for producing high quality defect free welds between dissimilar materials and alloys, [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] in particular, those systems such as metal matrix composites that are difficult or impossible to weld by conventional fusion welding. [34][35][36][37][38][39] The major difference between the FSW of similar and dissimilar materials is in the sharp discontinuity in properties across the weld cross section.…”

Section: Friction Stir Welding (Fsw) Is a Solid-statementioning

confidence: 99%

Evolution of Microstructure and Crystallographic Texture During Dissimilar Friction Stir Welding of Duplex Stainless Steel to Low Carbon-Manganese Structural Steel

Rahimi

Konkova

Violatos

et al. 2018

Metall Mater Trans A

View full text Add to dashboard Cite

Electron backscattered diffraction (EBSD) was used to analyze the evolution of microstructure and crystallographic texture during friction stir welding of dissimilar type 2205 duplex stainless steel (DSS) to type S275 low carbon-manganese structural steel. The results of microstructural analyses show that the temperature in the center of stirred zone reached temperatures between Ac 1 and Ac 3 during welding, resulting in a minor ferrite-to-austenite phase transformation in the S275 steel, and no changes in the fractions of ferrite and austenite in the DSS. Temperatures in the thermomechanically affected and shoulder-affected zones of both materials, in particular toward the root of the weld, did not exceed the Ac 1 of S275 steel. The shear generated by the friction between the material and the rotating probe occurred in austenitic/ferritic phase field of the S275 and DSS. In the former, the transformed austenite regions of the microstructure were transformed to acicular ferrite, on cooling, while the dual-phase austenitic/ferritic structure of the latter was retained. Studying the development of crystallographic textures with regard to shear flow lines generated by the probe tool showed the dominance of simple shear components across the whole weld in both materials. The ferrite texture in S275 steel was dominated by D 1 , D 2 , E, E , and F, where the fraction of acicular ferrite formed on cooling showed a negligible deviation from the texture for the ideal shear texture components of bcc metals. The ferrite texture in DSS was dominated by D 1 , D 2 , I, I , and F, and that of austenite was dominated by the A, A, B, and B of the ideal shear texture components for bcc and fcc metals, respectively. While D 1 , D 2 , and F components of the ideal shear texture are common between the ferrite in S275 steel and that of dual-phase DSS, the preferential partitioning of strain into the ferrite phase of DSS led to the development of I and I components in DSS, as opposed to E and E in the S275 steel. The formations of fine and ultrafine equiaxed grains were observed in different regions of both materials that are believed to be due to strain-induced continuous dynamic recrystallization (CDRX) in ferrite of both DSS and S275 steel, and discontinuous dynamic recrystallization (DDRX) in austenite phase of DSS.

show abstract

“…Their result illustrates that both NZ grains, size AA7075 and AA5083, could be refined by increasing the traverse speed, but AA5083 had a coarser grain structure, and various traverse speeds brought out the disparity of the dissimilar joint strength. S Serajzadeh et al focused on the microstructure, effect of tool geometry, residual stresses, and temperature field simulation regarding the dissimilar FSW 5086/6061 [17,18,19,20]. Furthermore, other dissimilar FSW aluminum alloys also were investigated, such as the AA2024/AA7075 couple [21] and the AA6061/AA7050 couple [22].…”

Section: Introductionmentioning

confidence: 99%

A Study on Dissimilar Friction Stir Welded between the Al–Li–Cu and the Al–Zn–Mg–Cu Alloys

Deng

Fan

et al. 2018

Materials

View full text Add to dashboard Cite

In this paper, the microstructure of friction stir welded between the Al–Li–Cu alloy and the Al–Zn–Mg–Cu alloy was studied using optical microscope(OM), electronic backscattered diffraction (EBSD), SEM, and TEM. The hardness profile revealed that the range of heat affect zone for the Al–Zn–Mg–Cu alloy was slightly wider than the Al–Li–Cu alloy when they suffered from the thermal transient. Additionally, the characterization of precipitates inside the different zones was obviously different, which corresponded to the microhardness distribution profile. At the periphery of the kissing line, the Al–Li–Cu and the Al–Zn–Mg–Cu alloys mutually diffused during the weld process. The magnesium element in the Al–Zn–Mg–Cu alloy diffused into the Al–Li–Cu alloy. But the copper and zinc had no change because of the low diffusion coefficient in aluminum. The heat affected zone of the Al–Zn–Mg–Cu alloy showed a higher corrosion susceptibility immersed into the corrosion environment, and the Al–Li–Cu alloy did not show severe corrosion.

show abstract

Effect of tool geometry on mechanical and microstructural behaviours in dissimilar friction stir welding of AA 5086–AA 6061

Cited by 46 publications

References 17 publications

A study on microstructures and residual stress distributions in dissimilar friction-stir welding of AA5086–AA6061

A study on microstructures and residual stress distributions in dissimilar friction-stir welding of AA5086–AA6061

Evolution of Microstructure and Crystallographic Texture During Dissimilar Friction Stir Welding of Duplex Stainless Steel to Low Carbon-Manganese Structural Steel

A Study on Dissimilar Friction Stir Welded between the Al–Li–Cu and the Al–Zn–Mg–Cu Alloys

Contact Info

Product

Resources

About