Navegando por Palavras-chave "beta-phase decomposition"

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    Completeness of beta-phase decomposition reaction in Cu-Al-Ag alloys
    (Springer, 2012-08-01) Silva, R. A. G. [UNIFESP]; Machado, E. S.; Adorno, A. T.; Magdalena, A. G.; Carvalho, T. M.; Universidade Federal de São Paulo (UNIFESP); Universidade Federal de Sergipe (UFS); UNESP
    The completeness of beta-phase decomposition reaction in the Cu-11wt%Al-xwt%Ag alloys (x = 0, 1, 2, and 3) was studied using differential scanning calorimetry (DSC), X-ray diffractometry (XRD), and optical microscopy (OM). the results indicated that beta-phase transformations are highly dependent on cooling rate and on the presence of Ag. On slow cooling, the silver presence prevents the beta- and beta(1)-phase decomposition; thus, inducing the martensitic phase formation. After rapid cooling, a new thermal event is observed and the reverse martensitic transformation is shifted to lower temperatures.