Effect of grain refinement on the strength and corrosion of AZ31 magnesium alloy following severe plastic deformation
- Gas tungsten arc welds made on wrought magnesium AZ31 plate have been characterized for corrosion in saline solution (3.5% NaCl). Microstructural changes induced by the welding process resulted in different environmental behaviour of each zone (BM-base metal, HAZ-heat affected zone and FZ-fusion zone). The faster kinetics of corrosion in FZ and especially HAZ are attributed to (a) the coarse microstructure, consisting of large grains, and (b) very small amounts of ß-phase in the grain boundaries. Also, hardness traverses have shown that these zones are weaker than the base metal. Based on the significant effect of grain size on strength in magnesium alloys, the weld metal grains have been systematically refined using controlled oscillation during welding, and by adding a grain refiner to the weld pool. Detailed microstructure analyses have been carried out and the relationships between corrosion behaviour, mechanical properties and microstructure (grain refinement and second-phasesGas tungsten arc welds made on wrought magnesium AZ31 plate have been characterized for corrosion in saline solution (3.5% NaCl). Microstructural changes induced by the welding process resulted in different environmental behaviour of each zone (BM-base metal, HAZ-heat affected zone and FZ-fusion zone). The faster kinetics of corrosion in FZ and especially HAZ are attributed to (a) the coarse microstructure, consisting of large grains, and (b) very small amounts of ß-phase in the grain boundaries. Also, hardness traverses have shown that these zones are weaker than the base metal. Based on the significant effect of grain size on strength in magnesium alloys, the weld metal grains have been systematically refined using controlled oscillation during welding, and by adding a grain refiner to the weld pool. Detailed microstructure analyses have been carried out and the relationships between corrosion behaviour, mechanical properties and microstructure (grain refinement and second-phases formation) are highlighted.…
Autor*innen: | Dan Eliezer, G.B. Hamu, Carl Edward Cross, Thomas Böllinghaus |
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Persönliche Herausgeber*innen: | T. Galloway |
Dokumenttyp: | Beitrag zu einem Sammelband |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Light metals 2006 |
Jahr der Erstveröffentlichung: | 2006 |
Herausgeber (Institution): | Minerals, Metals and Materials Society / Aluminum Committee |
Verlag: | TMS, the Minerals, Metals & Materials Society |
Verlagsort: | Warrendale |
Jahrgang/Band: | 135 |
Erste Seite: | 1 |
Letzte Seite: | 4 |
Veranstaltung: | 135th Annual Meeting of the Minerals, Metals & Materials Society |
Veranstaltungsort: | San Antonio, TX, USA |
Beginndatum der Veranstaltung: | 2006-03-12 |
Enddatum der Veranstaltung: | 2006-03-16 |
ISBN: | 978-0-87339-619-6 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Nein |