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

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Author(s):	Oliveira, A. B. ^[1] ; Paganotti, A. ^[1] ; Silva, R. A. G. ^[1] Total Authors: 3
Affiliation:	^[1] Univ Fed Sao Paulo, Dept Quim, Diadema, SP - Brazil Total Affiliations: 1
Document type:	Journal article
Source:	JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS; v. 135, DEC 2019.
Web of Science Citations:	1
Abstract
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)

FAPESP's process:	15/18996-0 - Effects of Gd and Mn additions on thermal, magnetic and mechanical properties of the Cu-9wt.%Al alloy
Grantee:	Ricardo Alexandre Galdino da Silva
Support Opportunities:	Regular Research Grants