MORPHOLOGY AND CHEMICAL NANOANALYSIS OF DISCONTINUOUS PRECIPITATION IN MG-AL ALLOYS .2. IRREGULAR GROWTH

被引：39
作者：
DULY, D
CHEYNET, MC
BRECHET, Y
机构：
[1] Laboratoire de Thermodynamique et Physico-Chimie Métallurgiques, ENSEEG, 38402 Saint Martin d'Hères
来源：
ACTA METALLURGICA ET MATERIALIA | 1994年 / 42卷 / 11期
关键词：
Chemical analysis - Crystal defects - Crystal growth - Mathematical models - Morphology - Precipitation (chemical) - Reaction kinetics - Thermodynamics - Transmission electron microscopy;
D O I：
10.1016/0956-7151(94)90451-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Local chemical analysis of discontinuous precipitation in Mg-Al alloys has been performed in various cases where the lamellae exhibit a change in habit plane. It is shown that such an event is always preceded by the appearance of an asymmetry in the solute concentration profile in the alpha lamellae, and that it results in a decrease of this asymmetry. From a stability analysis of the grain boundary shape, a scenario is proposed for explaining the occurrence of these changes in habit planes.
引用
收藏
页码：3855 / 3863
页数：9
相关论文
共 11 条
[1]   IN-SITU OBSERVATION OF CELLULAR PRECIPITATION IN AN AL-28 AT PERCENT ZN ALLOY BY HIGH-VOLTAGE ELECTRON-MICROSCOPY [J].
BUTLER, EP ;
RAMASWAM.V ;
SWANN, PR .
ACTA METALLURGICA, 1973, 21 (04) :517-524
[2]   THE KINETICS OF CELLULAR SEGREGATION REACTIONS [J].
CAHN, JW .
ACTA METALLURGICA, 1959, 7 (01) :18-28
[3]  
DALY D, 1992, THESIS I POLYTECHNIQ
[4]   MACROSCOPIC KINETICS OF DISCONTINUOUS PRECIPITATION IN A MG-8.5 WT-PERCENT AL-ALLOY [J].
DULY, D ;
BRECHET, Y ;
CHENAL, B .
ACTA METALLURGICA ET MATERIALIA, 1992, 40 (09) :2289-2300
[5]   THEORIES OF GROWTH DURING DISCONTINUOUS PRECIPITATION [J].
HILLERT, M .
METALLURGICAL TRANSACTIONS, 1972, 3 (11) :2729-&
[6]   INSTABILITIES AND PATTERN-FORMATION IN CRYSTAL-GROWTH [J].
LANGER, JS .
REVIEWS OF MODERN PHYSICS, 1980, 52 (01) :1-28
[7]  
PORTER DA, 1975, THESIS CAMBRIDGE U
[8]   INTERLAMELLAR SPACING IN DISCONTINUOUS PRECIPITATION [J].
SOLORZANO, IG ;
PURDY, GR .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1984, 15 (06) :1055-1063
[9]  
SPEICH GR, 1963, T METALL SOC AIME, V227, P754
[10]   CELLULAR PRECIPITATION [J].
SUNDQUIS.BE .
METALLURGICAL TRANSACTIONS, 1973, 4 (08) :1919-1934
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