Similar and dissimilar welds of ultrafine grained aluminium obtained by friction stir welding

The effect of friction-stir welding (FSW) on microstructure and mechanical properties of Zr-modified AA5083 aluminum alloy was studied. FSW was observed to lead to the formation of fully recrystallized ultrafine-grained microstructures and preservation of nanoscale dispersoids in stir zone. The joint efficiency of the friction-stir welds for ultimate tensile strength was found to be 94% and 74% in the hot-rolled and cold-rolled preprocessed material conditions. The stir zone microstructure was predicted to be stable against abnormal grain growth during post-weld heat treatment.

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Microstructural Evolution during Friction Stir Welding of Ultrafine Grained Al Alloys

Materials Science Forum - Nanomaterials by Severe Plastic Deformation ◽

10.4028/0-87849-985-7.169 ◽

2006 ◽

pp. 169-174

Author(s):

Yutaka S. Sato ◽

M. Urata ◽

Y. Kurihara ◽

S.H.C. Park ◽

Hiroyuki Kokawa ◽

...

Keyword(s):

Friction Stir Welding ◽

Microstructural Evolution ◽

Al Alloys ◽

Friction Stir ◽

Ultrafine Grained

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Friction stir welding of nano/ultrafine-grained AA2024 alloy produced through an accumulative roll bonding process

MRS Communications ◽

10.1557/s43579-021-00139-4 ◽

2022 ◽

Author(s):

M. Naseri ◽

M. Alvand ◽

D. Gholami ◽

E. Borhani ◽

H. Abdollah-Pour ◽

...

Keyword(s):

Friction Stir Welding ◽

Accumulative Roll Bonding ◽

Bonding Process ◽

Accumulative Roll Bonding Process ◽

Roll Bonding ◽

Friction Stir ◽

Ultrafine Grained

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Deformation Behaviour of Accumulative Roll Bonded and Friction Stir Welded Aluminium Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.584-586.833 ◽

2008 ◽

Vol 584-586 ◽

pp. 833-839 ◽

Cited By ~ 3

Author(s):

Irena Topic ◽

Heinz Werner Höppel ◽

Matthias Göken

Keyword(s):

Friction Stir Welding ◽

Deformation Behaviour ◽

Friction Stir ◽

Ultrafine Grained ◽

Purity Aluminium ◽

Initiation And Propagation ◽

Hydraulic Bulge ◽

Commercial Purity Aluminium ◽

Von Mises ◽

Ultrafine Grained Microstructure

Commercial purity aluminium AA1050 and aluminium alloy AA6016 were accumulative roll bonded and subsequently friction stir welded. The microstructure of the conventional and ultrafine-grained materials produced by accumulative roll bonding is strongly affected by friction stir welding. The elongated ultrafine-grained microstructure of roll bonded sheets becomes coarser and equiaxed in the nugget region. Hydraulic bulge tests showed that higher burst pressure can be achieved for samples without friction stir welding than for the ones with friction stir welding. Localised deformation, crack initiation and propagation, as well as the final fracture occurred within the nugget. Friction stir welded AA1050 sheet showed similar achievable burst pressures and von Mises equivalent strains compared to the as-received conventionally grained sheets. On the other hand, significantly higher burst pressures and at the same time higher von Mises equivalent strains were observed for the friction stir welded ultrafine-grained material than for the friction stir welded conventionally grained material.

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Tensile Strength and Metallurgical Analysis in Anodized Al/Cu Joint Using Friction Stir Welding

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.656-657.490 ◽

2015 ◽

Vol 656-657 ◽

pp. 490-495

Author(s):

Pei Lun Ting ◽

Chi Ying Tsai ◽

Liu Ho Chiu ◽

Chin Pao Cheng

Keyword(s):

Tensile Strength ◽

Friction Stir Welding ◽

Layer Thickness ◽

Microstructural Analysis ◽

Oxide Phase ◽

Copper Sheet ◽

Anodized Aluminum ◽

Friction Stir ◽

A Value ◽

Dissimilar Welds

Tensile strength, metallographic and structural analyses of anodized aluminum sheet–copper sheet dissimilar welds produced under various friction stir welding (FSW) conditions were conducted. The 6061 specimens were heated to 530~570 oC, held for 1 hour, followed by water quenching and furnace cooling. AA 6061-T6 Al sheets were anodized to thicknesses of 5μm and 12μm, respectively. FSW joints were characterized using microstructural analysis, microhardness measurements and tensile testing. The tensile strength of the 6061-T6/6061-T6 joint using FSW is 145 MPa. However, the tensile strength of the 6061-T6/Cu joint using FSW is decreased to 100 MPa. When the anodized layer was increased the tensile strength of the 6061-T6/Cu joint using FSW was decreased to a value below 50 MPa. Increasing the anodized layer thickness disturbed material mixing and the formation of increasing amounts of oxide rich structures. The oxide phase content and the mixed area homogeneity were increased with increasing layer thickness, decreasing the tensile strength of the FSW joints.

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