Precipitation sequence in a QE22 magnesium alloy


https://doi.org/10.4081/microscopie.2011.4977
Vol. 15 No. 1 (2011)
Submitted: 15 January 2015
Accepted: 15 January 2015
Published: 31 March 2011
precipitation hardening, thermal treatments, differential scanning calorimetry, transmission electron microscopy.
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PDF: 1059
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Authors

  • G. Barucca Dipartimento di Fisica e Ingegneria dei Materiali e del Territorio, Università Politecnica delle Marche, Ancona, Italy.
  • A. Di Cristoforo Dipartimento di Fisica e Ingegneria dei Materiali e del Territorio, Università Politecnica delle Marche, Ancona, Italy.
  • D. Lussana Dipartimento di Chimica I.F.M., Centro di Eccellenza N.I.S. and CNISM, Università di Torino, Torino, Italy.
  • P. Mengucci
    p.mengucci@univpm.it
    Dipartimento di Fisica e Ingegneria dei Materiali e del Territorio, Università Politecnica delle Marche, Ancona, Italy.
  • E. Santecchia Dipartimento di Fisica e Ingegneria dei Materiali e del Territorio, Università Politecnica delle Marche, Ancona, Italy.
The hardening phase evolution in a QE22 Mg alloy is followed by differential scanning calorimetry, microhardness and transmission electron microscopy, after different thermal treatments. The decomposition of the supersaturated solid solution occurs via the formation of nanometric coherent structures (co-clusters or GP zones) followed by the co-precipitation of two metastable phases responsible for the peak ageing condition. The stable phase (Mg,Ag)12Nd appears at the highest annealing times, giving rise to overageing and hardness reduction. TEM observations provide information on the crystallographic structure of the forming phases

Barucca, G., Di Cristoforo, A., Lussana, D., Mengucci, P., & Santecchia, E. (2011). Precipitation sequence in a QE22 magnesium alloy. Microscopie, 15(1), 54–59. https://doi.org/10.4081/microscopie.2011.4977

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