Microstructural evolution of electron beam welded 2219-T6 Al alloy

Tosto, Sebastiano; Valli, M.; Nenci, F.; Pierdominici, F.

doi:10.1007/bf00318264

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Furthermore, positron annihilation measurements have shown that GP zones were not formed from supersaturated solid solution during aging of the EB welded alloy in a furnace at 190°C. 21 As shown in Fig. 3, microhardness increased with the number of passes.…”

Section: Variation Of Microhardness After Eb Post-weld Treatmentsmentioning

confidence: 86%

Microstructure and properties of electron beam welded and post-welded 2219 aluminium alloy

Tosto¹,

Nenci²,

Hu³

1996

Materials Science and Technology

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The present paper concerns the microstructure of electron beam (EB) butt welded 2219 aluminium alloy. Crack and porosity free joints were obtained. The EB was also used to carry out in situ post-weld treatments. As a consequence, the microhardness was raised significantly to values very similar to that of the untreated alloy after five pass EB treatments. The contribution to the enhanced microhardness is thought to be related to the early precipitated CuAl2 phase and immobile dislocations. The microstructure is discussed in terms of effects induced specifically by EB processing. This investigation shows that the in situ post-weld treatments can be regarded as a useful procedure for improving both microstructure and properties of EB welded joints.MSTj3084

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Section: Variation Of Microhardness After Eb Post-weld Treatmentsmentioning

confidence: 86%

Microstructure and properties of electron beam welded and post-welded 2219 aluminium alloy

Tosto¹,

Nenci²,

Hu³

1996

Materials Science and Technology

Self Cite

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“…Several previous experiments showed the feasibility of DBS for the detection of open volume defects as for instance, the indirectly probing of the γ / martensitic phase transformation by detecting the correlated defect concentrations [7]. Furthermore, DBS was used in order to characterize the microstructural evolution of electron beam welded Al alloys as a function of aging conditions [8].…”

Section: Introductionmentioning

confidence: 99%

Spatially resolved positron annihilation spectroscopy on friction stir weld induced defects

Hain

Hugenschmidt

Pikart

et al. 2010

Science and Technology of Advanced Materials

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A friction stir welded (FSW) Al alloy sample was investigated by Doppler broadening spectroscopy (DBS) of the positron annihilation line. The spatially resolved defect distribution showed that the material in the joint zone becomes completely annealed during the welding process at the shoulder of the FSW tool, whereas at the tip, annealing is prevailed by the deterioration of the material due to the tool movement. This might be responsible for the increased probability of cracking in the heat affected zone of friction stir welds. Examination of a material pairing of steel S235 and the Al alloy Silafont36 by coincident Doppler broadening spectroscopy (CDBS) indicates the formation of annealed steel clusters in the Al alloy component of the sample. The clear visibility of Fe in the CDB spectra is explained by the very efficient trapping at the interface between steel cluster and bulk.

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