Kinetics of martensite decomposition in a Gd-modified Cu-Al alloy

Autor(es)

Oliveira, A. B. ^[1] ; Paganotti, A. ^[1] ; Silva, R. A. G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Dept Quim, Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS; v. 135, DEC 2019.
• Citações Web of Science: 1

Resumo

In this study, the kinetics of martensite decomposition and the microstructural evolution of the Cu79.7Al19.2Gd1.1 alloy were evaluated based on microhardness measurements as a function of the aging time and quenching temperature, as well as differential scanning calorimetry, scanning electron microscopy, and X-ray diffractometry. The results indicated that the alpha(2)-(Cu4Al) phase was more rapidly disordered than the beta(1)'-(Cu3Al) phase in the Cu81.1Al18.9 alloy. The addition of Gd to the Cu81.1Al18.9 alloy seems to increase the a phase precipitation and the martensite phase decomposition rates. A new thermal event was observed in the Cu79.7Al19.2Gd1.1 alloy after aging at 150 degrees C for 14400min (10 days). Changes in the phase transition mechanism also occurred during aging from 350 degrees C for the Cu81.1Al18.9 alloy and from 300 degrees C for the Cu79.7Al19.2Gd1.1 alloy. (AU)

• Processo FAPESP: 15/18996-0 - Estudo dos efeitos das adições de Gd e Mn sobre as propriedades térmicas, magnéticas e mecânicas da liga Cu-9%Al
• Beneficiário: Ricardo Alexandre Galdino da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular