Deformation-induced dynamic precipitation during creep in magnesium-tin alloys

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Authors

The oversaturated solutes in the alloy matrix, which are caused by nonequilibrium phase transformation during casting or T4 treatment, can precipitate in the subsequent annealing treatments or during service at high temperatures. Under deformation the precipitation could be enhanced in comparison to conventional isothermal ageing. The present work investigates the dynamic precipitation of oversaturated Mg-Sn alloys during creep. The influence of this dynamic precipitation on creep properties is discussed. It is found that the distribution of deformation-induced precipitates is inhomogeneous. These precipitates are first formed at grain boundaries and then at deformation bands which are kinetically and thermodynamically favourable. The dynamic precipitation accompanies the volume change of phases, which influences the subsequent formation and growth of voids. Consequently, the creep behaviour also changes due to different precipitation under deformation.

Original languageEnglish
JournalKey Engineering Materials
Volume627
Pages (from-to)365-368
Number of pages4
ISSN1013-9826
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event13th International Conference on Fracture and Damage Mechanics, FDM 2014 - Ponta Delgada, Azores, Portugal
Duration: 23.09.201425.09.2014
Conference number: 13

    Research areas

  • Creep, Magnesium alloys, Microstructure, Precipitation
  • Engineering