ON THE ENHANCED GRAIN-GROWTH IN ULTRAFINE GRAINED METALS

被引：166

作者：

LIAN, JS

VALIEV, RZ

BAUDELET, B

机构：

[1] Ge ́nie Physique et Me ́canique des Mate ́riaux, Institut National Polytechnique de Grenoble, B.P. 46

来源：

ACTA METALLURGICA ET MATERIALIA | 1995年 / 43卷 / 11期

关键词：

D O I：

10.1016/0956-7151(95)00087-C

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The static grain growth has been investigated in ultrafine grained copper with an initial grain size of 160 nm. It has been revealed that its kinetics follows to normal grain growth behaviour, but a grain growth starts at a relatively low temperature (0.32 T-m). Good fits with experimental data for several ultrafine grained metals have been obtained if the activation energy for grain boundary diffusion is assumed to be lower than for coarse grained materials, but increases during grain growth. It is suggested that this unusual behaviour of the activation energy is caused by the presence of non-equilibrium grain boundaries in ultrafine grained materials and their recovery during heating

引用

页码：4165 / 4170

页数：6

共 20 条

[11]

KAUR I, 1989, HDB GRAIN INTERPHASE, V1, P17

[12] MICROSTRUCTURES AND HARDNESS OF ULTRAFINE-GRAINED NI3AL [J].

LANGUILLAUME, J ;

CHMELIK, F ;

KAPELSKI, G ;

BORDEAUX, F ;

NAZAROV, AA ;

CANOVA, G ;

ESLING, C ;

VALIEV, RZ ;

BAUDELET, B .

ACTA METALLURGICA ET MATERIALIA, 1993, 41 (10) :2953-2962

[13]

Lian J., 1993, Nanostructured Materials, V2, P415, DOI 10.1016/0965-9773(93)90184-D

[14]

MUSSALIMOV RS, 1992, SCRIPTA METALL MATER, V27, P1685

[15]

Nazarov A. A., 1994, Nanostructured Materials, V4, P93, DOI 10.1016/0965-9773(94)90131-7

[16] STRUCTURE OF NANOMETER-SIZED POLYCRYSTALLINE IRON INVESTIGATED BY POSITRON LIFETIME SPECTROSCOPY [J].

SCHAEFER, HE ;

WURSCHUM, R ;

BIRRINGER, R ;

GLEITER, H .

PHYSICAL REVIEW B, 1988, 38 (14) :9545-9554

[17] DEFORMATION-BEHAVIOR OF ULTRA-FINE-GRAINED COPPER [J].

VALIEV, RZ ;

KOZLOV, EV ;

IVANOV, YF ;

LIAN, J ;

NAZAROV, AA ;

BAUDELET, B .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (07) :2467-2475

[18] STRUCTURE AND PROPERTIES OF ULTRAFINE-GRAINED MATERIALS PRODUCED BY SEVERE PLASTIC-DEFORMATION [J].

VALIEV, RZ ;

KORZNIKOV, AV ;

MULYUKOV, RR .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 168 (02) :141-148

[19] THE HALL-PETCH RELATION IN SUBMICRO-GRAINED AL-1.5-PERCENT MG ALLOY [J].

VALIEV, RZ ;

CHMELIK, F ;

BORDEAUX, F ;

KAPELSKI, G ;

BAUDELET, B .

SCRIPTA METALLURGICA ET MATERIALIA, 1992, 27 (07) :855-860

[20]

Weissmuller J., 1992, Nanostructured Materials, V1, P439, DOI 10.1016/0965-9773(92)90076-A

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