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Assessment of FSW Welds Made of Aluminum Alloy AW7075-T651.

Abstrakt

This paper summarizes the results of experimental studies in which the aluminum alloy AW7075-T651 was friction stir welded (FSW) using various combinations of process parameters (rotational - R and travel speed - T). Mechanical properties of the test welds were assessed by using static tensile test and Vickers hardness measurement. The temperature of the welded plates was monitored during welding by means of thermocouples placed on both sides of the joint line, 15 mmfrom the weld axis as well as by using thermo camera. The microstructure, chemical composition and phase identification of the welding joints were examined using optical and scanning electronmicroscopy, energy dispersive X-ray spectroscopy and X-ray diffractometry (XRD). Investigations revealed that the temperatures at the weld center can reach values close to 550 °C and raised withR/T ratio increasing. It was found that tensile strength of welded joints is not correlated with R/T ratio and averages about 60% to 80% of tensile strength of a base material AW7075-T651. XRD analysis demonstrated that there is also deformation texture in the nugget (WN) and the thermomechanical affected zone (TMAZ) with strong dependence on process parameters.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
Opublikowano w:
Solid State Phenomena nr 165, strony 201 - 206,
ISSN: 1012-0394
Język:
angielski
Rok wydania:
2010
Opis bibliograficzny:
Szkodo M., Adamowski J., Sitko A.: Assessment of FSW Welds Made of Aluminum Alloy AW7075-T651.// Solid State Phenomena. -Vol. 165., (2010), s.201-206
Weryfikacja:
Politechnika Gdańska

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