Completeness of beta-phase decomposition reaction in Cu-Al-Ag alloys

Silva, R. A. G. [UNIFESP]; Machado, E. S.; Adorno, A. T.; Magdalena, A. G.; Carvalho, T. M.

Completeness of beta-phase decomposition reaction in Cu-Al-Ag alloys

Data

2012-08-01

Autores

Silva, R. A. G.

Machado, E. S.

Adorno, A. T.

Magdalena, A. G.

Carvalho, T. M.

Tipo

Artigo

Resumo

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.

Citação

Journal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 109, n. 2, p. 927-931, 2012.