MACROSCOPIC KINETICS OF DISCONTINUOUS PRECIPITATION IN A MG-8.5 WT-PERCENT AL-ALLOY

被引：45
|
作者：
DULY, D [1 ]
BRECHET, Y [1 ]
CHENAL, B [1 ]
机构：
[1] PECHINEY, CTR RECH VOREPPE SA, F-38340 VOREPPE, FRANCE
来源：
ACTA METALLURGICA ET MATERIALIA | 1992年 / 40卷 / 09期
关键词：
D O I：
10.1016/0956-7151(92)90147-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The macroscopic kinetics of discontinuous precipitation in two Mg-8.5 wt% Al alloys with different initial average grain sizes has been studied at 220-degrees-C by quantitative optical metallography, hardness measurements and integrated intensity measurements of the precipitate peaks during in situ X-ray experiments. The kinetics observed can be described by Johnson-Mehl-Avrami's law, which indicates that a reaction front stops when it meets an immobile grain boundary. Moreover, the precipitation nodule nucleation probably takes place via the mechanism observed and described by Fournelle and Clark, as can be infered from the grain size dependence of the nucleation rate.
引用
收藏
页码：2289 / 2300
页数：12
相关论文
共 50 条
  • [11] INFLUENCE OF PRIOR DEFORMATION ON PRECIPITATION OF CU-1.9 WT-PERCENT BE-0.1 WT-PERCENT MG ALLOY
    LIU, Y
    YONG, L
    WANG, YY
    YAO, HN
    JOURNAL OF MATERIALS SCIENCE LETTERS, 1991, 10 (21) : 1235 - 1236
  • [12] DIFFERENT TYPES OF DISCONTINUOUS PRECIPITATION IN CU-15 WT-PERCENT IN ALLOY
    SAHEB, N
    BOUMERZOUG, Z
    HAMANA, D
    LAOUI, T
    VANDERBIEST, O
    SCRIPTA METALLURGICA ET MATERIALIA, 1995, 32 (09): : 1453 - 1458
  • [13] DEFORMATION TEXTURE OF SUPERPLASTIC ZN-1.1 WT-PERCENT AL-ALLOY
    MALEK, P
    LUKAC, P
    MAREK, J
    KOVOVE MATERIALY-METALLIC MATERIALS, 1982, 20 (05): : 601 - 609
  • [14] KINETICS OF PRECIPITATION IN A PB-0.068 WT-PERCENT AG ALLOY
    NOZATO, R
    YAMAJI, T
    TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS, 1980, 21 (03): : 131 - 139
  • [15] KINETICS OF DISCONTINUOUS DISSOLUTION IN AN FE-20 WT-PERCENT ZN ALLOY
    NAKKALIL, R
    GUPTA, SP
    ZEITSCHRIFT FUR METALLKUNDE, 1989, 80 (01): : 37 - 47
  • [16] PHENOMENOLOGY OF DISCONTINUOUS PRECIPITATION IN A COLD-ROLLED COPPER 1.5 WT-PERCENT BE ALLOY
    BORCHERS, H
    SCHULZ, H
    ZEITSCHRIFT FUR METALLKUNDE, 1975, 66 (09): : 525 - 533
  • [17] SUPERPLASTICITY IN A COARSE-GRAINED ZN-1.1 WT-PERCENT AL-ALLOY
    MALEK, P
    CZECHOSLOVAK JOURNAL OF PHYSICS, 1988, 38 (04) : 406 - +
  • [18] DEFORMATION-MECHANISM MAP FOR TI-6 WT-PERCENT AL-ALLOY
    JANGHORBAN, K
    ESMAEILI, S
    JOURNAL OF MATERIALS SCIENCE, 1991, 26 (12) : 3362 - 3365
  • [19] MICROSTRUCTURE OF AN ARC-MELTED TI-27.3 WT-PERCENT AL-ALLOY
    SUNDARARAMAN, M
    MUKHOPADHYAY, P
    METALLOGRAPHY, 1979, 12 (01): : 87 - 94
  • [20] SUPERPLASTICITY OF A ZN-1.1 WT-PERCENT AL-ALLOY AT HIGH-TEMPERATURES
    MALEK, P
    SCRIPTA METALLURGICA, 1985, 19 (04): : 405 - 410
12345