Dependence of the microstructure, residual stresses and texture of AA 6013 friction stir welds on the welding proces

Lima, E. B. F.; Wegener, J.; Donne, C. Dalle; Goerigk, G.; Wróblewski, T.; Buslaps, T.; Pyzalla, A.; Reimers, W.

doi:10.3139/146.030908

Cited by 35 publications

(25 citation statements)

References 3 publications

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“…[2,[9][10][11][12][13][14][15] Solid state welding processes naturally avoid solidification and, thus, have particular advantages for joining dissimilar materials with very different melting intervals or materials prone to hot cracking. [16,17] Among pressure welding methods, friction welding has gained increasing application within the last years which is mostly a result of the development of the friction stir welding (FSW) technique. [18][19][20] In the FSW process a rotating shouldered tool with a profiled pin is inserted between the base materials.…”

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confidence: 99%

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Microstructure and Mechanical Properties of an AA6181‐T4 Aluminium Alloy to HC340LA High Strength Steel Friction Stir Overlap Weld

et al. 2008

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Friction stir welding (FSW) of dissimilar joints offers serveral advantages over conventional fusion joining techniques since no associated melting is involved. In this study, FSW was applied to join AA6181‐T4 aluminium alloy to HC340LA high strength steel and a systematic investigation of the microstructure formation, the development of FexAly intermetallic compounds and their influences on the mechanical behaviour is presented. Based on fractography analyses, a possible failure scenario for the joint during shear test is also proposed.

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“…[16,17,[20][21][22][23] Recently dissimilar friction stir welded joints between Al alloys and Mg alloys have successfully been produced. [24,25] Compared to friction stir welding of Al and Mg alloys, friction stir welding of steel imposes much higher demands on the tool material.…”

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Microstructure and Mechanical Properties of an AA6181‐T4 Aluminium Alloy to HC340LA High Strength Steel Friction Stir Overlap Weld

et al. 2008

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“…23 The additional features on the shoulder surface such as scrolls also play an exceptionally important role by providing additional frictional treatment and better material flow. [24][25] In the present investigation, the combined effect of shoulder-driven and pin-driven flow has been observed in all samples. It can be inferred that the tool shoulder diameter of 16 and 18 mm could not generate sufficient frictional heat and material flow, which results in the agglomeration of reinforcement particles in RS of SZ due to higher flow stresses and poor material flow.…”

Section: Macro and Micro-structurementioning

confidence: 63%

Surface nanocomposite fabrication on AA6063 aluminium alloy using friction stir processing: an investigation into the effect of the tool-shoulder diameter on the composite microstructure

Gangil¹,

Maheshwari²,

Siddiquee³

2018

Mater. Tehnol.

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In this work, surface metal matrix composites (SMMCs) were fabricated on AA6063 base metal through friction stir processing (FSP). In all the samples for surface composites, grooves of 2 mm × 2 mm were made along the centreline of plates and TiB2 powder (~80 nm) was filled and compacted in these grooves. A pinless tool was employed to initially cover and compact the grooves filled with TiB2 particles to prevent it from sputtering during FSP. Tools of different shoulder diameters (16, 18, and 20) mm with anti-clockwise scrolls on the shoulder surface were used for the FSP with constant pin diameter and pin length. The tool rotational speed of 900 min -1 , traversing speed of 40 mm/min and tilt 2°, respectively, kept constant for all the experiments. Macro, optical micro images and micro hardness tests were used to evaluate the particle distribution. Powder agglomeration was observed in the retreating side of samples processed with 16 mm and 18 mm shoulder diameter tools. On the other hand, significant improvement in particle distribution and excellent bonding with the substrate were observed for the sample processed with 20 mm shoulder diameter tool. The findings of this investigation are important and provide knowledge for better tool design and effective tool selection to bring out better distribution in a single pass. Keywords: friction stir processing, aluminium alloy, shoulder diameter, microstructure V tem prispevku avtorji opisujejo izdelavo in raziskavo izdelanega nanokompozita s kovinsko osnovo (angl.: SMMCs; Surface Metal Matrics Composites) na povr{ini aluminijeve zlitine vrste AA6063, izdelanega s pomo~jo vrtilno (rotacijsko) trenjskega procesa (angl.: FSP; Friction Stir Processing). Vsi vzorci povr{inskega kompozita {irine 2 mm in globine 2 mm so bili izdelani vzdol`sredi{~ne linije kovinske plo{~e. Pri tem so bili med FSP dodajani pribli`no 80 nm delci TiB2 prahu v nastajajo~e brazde. Za za~etno prekrivanje in kompaktiranje brazd napolnjenih s TiB2 so uporabili orodje brez trna in s tem prepre~ili razpr{evanje delcev med FSP. Za izdelavo SMMCs so uporabili dr`ala razli~nih premerov (16, 18, in 20) mm z valj~ki, name{~enimi na povr{ini dr`al, ki so se vrteli v nasprotni smeri urnega kazalca. Pri tem so za FSP uporabili trn s konstantnim premerom in dol`ino. Pri vseh preizkusih so za izbrani FSP uporabili hitrost vrtenja 900 min -1 , vzdol`no hitrost potovanja orodja 40 mm/min, in nagib 2°. Da bi ugotovili porazdelitev delcev TiB2 v izdelanih SMMCs so izvedli metalografske preiskave in dolo~ili mikrotrdoto kompozitov. Opazili so aglomeracijo pra{nih delcev na vzorcih izdelanih s 16 mm in 18 mm premerom dr`ala orodja. Po drugi strani pa so dosegli pomembno izbolj{anje porazdelitve pra{nih delcev in njihovo odli~no vezavo s kovinsko osnovo pri vzorcih, ki so bili izdelani z 20 mm premerom dr`ala orodja. Ugotovitve te raziskave omogo~ajo bolj{e oblikovanje in u~inkovito izbiro orodja za doseganje optimalne porazdelitve nanodelcev v kovinski osnovi pri FSP z enim samim prehodom F. Klju~ne besede: proce...

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“…The (103), (112) and (201) diffraction lines are those used for the stress estimation. It can be seen that longitudinal stresses resulting from FSW are mostly of tensile nature under the shoulder region and comprise the SZ and the TMAZ turning into compression towards the base metals 11,14 . Also, it shows a symmetrical trend, which is similar to an "M" shape and the maximum residual tensile stress occurring within the retreating side was 30 MPa.…”

Section: Macrostructurementioning

confidence: 99%

Microstructure and Residual Stresses in a Friction Stir Welded Butt Joint of as-cast ZK60 Alloy Containing Rare Earths

Silva

Oliveira

Pereira³

et al. 2017

Mat. Res.

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The effect of a travel speed of 200 mm/min as well as a tool rotational speed of 1200 rpm on butt joint quality of friction stir welding (FSW) ZK60 magnesium casting alloy containing 1.5 wt.% rare earths (ZK60-1.5RE) was investigated to determine microstructure and residual stresses. FSW results in the generation of heterogeneous metallurgical structures consisting of the base material (BM), stirred zone (SZ) and thermo-mechanical affected zone (TMAZ). The stirring action also produced a non-uniform distribution and segregation of intermetalics. The transversal distribution of the longitudinal welding stresses exhibits a "M-like" shape with mostly tensile stresses under the shoulder region and only one compressive stress peak in the advancing side of the SZ and TMAZ. It could be demonstrated that FSW of ZK60-1.5RE alloy was successful in the welding conditions applied during the present work.

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Dependence of the microstructure, residual stresses and texture of AA 6013 friction stir welds on the welding proces

Cited by 35 publications

References 3 publications

Microstructure and Mechanical Properties of an AA6181‐T4 Aluminium Alloy to HC340LA High Strength Steel Friction Stir Overlap Weld

Microstructure and Mechanical Properties of an AA6181‐T4 Aluminium Alloy to HC340LA High Strength Steel Friction Stir Overlap Weld

Surface nanocomposite fabrication on AA6063 aluminium alloy using friction stir processing: an investigation into the effect of the tool-shoulder diameter on the composite microstructure

Microstructure and Residual Stresses in a Friction Stir Welded Butt Joint of as-cast ZK60 Alloy Containing Rare Earths

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