Coincidence Doppler broadening study of phase decomposition in a continuous cast AA 2037 Al alloy

Y. C. Wu, S. L. Wu, Y. Q. Chen, S. J. Wang, T. Zhai

Research output: Contribution to journalConference articlepeer-review


Phase decomposition in hot band of a continuous cast AA 2037 Al alloy was investigated by coincidence Doppler broadening (CDB) of positron annihilation radiation and positron annihilation lifetime spectroscopy (PALS). It was found that there existed V-Cu and V-Cu-Mg complexes in the as-received hot band at room temperature. At 200°C, positron average lifetime appeared to be a maximum value because of the formation of semi-coherent precipitates. The shape of the CDB ratio curve was found to be characteristic of Mn, which indicated the formation of V-Mn complexes or the existence of Mn clusters in the semicoherent precipitates. Above 250°C, coarsening and dissolution of semi-coherent precipitates resulted in a decrease in lifetime and disappearance of the Mn signal, but the Cu signal increased clearly with increase in annealing temperature.

Original languageEnglish
Pages (from-to)3497-3501
Number of pages5
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number10
StatePublished - 2007
Event14th International Conference on Positron Annihilation, ICPA 14 - Hamilton, ON, Canada
Duration: Jul 23 2006Jul 28 2006

ASJC Scopus subject areas

  • Condensed Matter Physics


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