MORPHOLOGY AND CHEMICAL NANOANALYSIS OF DISCONTINUOUS PRECIPITATION IN MG-AL ALLOYS .1. REGULAR GROWTH

Authors
DULY D CHEYNET MC BRECHET Y
Citation
D. Duly et al., MORPHOLOGY AND CHEMICAL NANOANALYSIS OF DISCONTINUOUS PRECIPITATION IN MG-AL ALLOYS .1. REGULAR GROWTH, Acta metallurgica et materialia, 42(11), 1994, pp. 3843-3854
Citations number
24
Categorie Soggetti
Material Science","Metallurgy & Mining
Journal title
Acta metallurgica et materialia → ACNP
ISSN journal
09567151
Volume
42
Issue
11
Year of publication
1994
Pages
3843 - 3854
Database
ISI
SICI code
0956-7151(1994)42:11<3843:MACNOD>2.0.ZU;2-D
Abstract
Discontinuous precipitation in Mg-Al alloys has been studied both by c onventional TEM (morphology) and STEM with local chemical analysis (co ncentration profiles). Numerous growth defects have been identified. I n the case of regular growth, a detailed analysis of concentration pro files using Cahn's solution has been performed, proving the necessity to introduce three velocity scales in order to describe the overall ki netics. The thermodynamical balance of the phenomenon has been derived by applying Hillert's model.