Zinc base alloys; Phase transformations; Aluminum; Alloying elements; Phase decomposition; Microstructure; Spinodal decomposition; Aging; Copper; Alloying additive; Magnesium; LiMaRC - Liège Materials Research Center
Abstract :
[en] The purpose of this work is to study the complex evolution observed during aging and the effect of alloying elements in ZA12 and ZA27. The results confirm the existence of the cellular reaction which appears very quickly: after 1 h at 100 deg C the quench alpha sub 1 phase has nearly decomposed and the lamellae have begun to appear. Evidence of the second stage of aging is shown by the aged Zn--10.2% Al which exhibits fine precipitates alpha ' sub m FCC in alpha ' lamellae. When the aging time is increased diffusion of Zn inside these particles increases the difference in crystalline parameters leading to alpha ' HCP precipitates and finally to eta HCP. The aging is completed when the fine microstructure alpha ' sub m has disappeared leading is large globular grains of alpha and Beta
Disciplines :
Materials science & engineering Chemical engineering
Author, co-author :
Lecomte-Beckers, Jacqueline ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Terziev, L.
Greday, T.
Language :
English
Title :
Aspects of the phase transformation during aging of Zn-11% Al and Zn-27% Al alloys
Publication date :
1987
Event place :
Cambridge (Institute of metals), United Kingdom
Event date :
6-10 July 1987
Audience :
International
Main work title :
Proceedings of the International Conference on Phase Transformation
