The influence of grain size on deformation of copper

被引：5

作者：

Chokshi, AH ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Met, Bangalore, Karnataka, India

来源：

THERMEC'2003, PTS 1-5 | 2003年 / 426-4卷

关键词：

nanocrystalline; Hall-Petch; grain boundary sliding; diffusion creep; superplasticity;

D O I：

10.4028/www.scientific.net/MSF.426-432.4393

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is well know that grain boundaries enhance strength at low temperatures by acting as obstacles to dislocation motion, and they retard strength at higher temperatures by processes involving grain boundary sliding. The available data on the influence of grain boundaries on deformation in copper is summarized. Equi-channel angular extrusion offers a convenient means for imposing severe plastic deformation to refine the grain size in bulk materials. Experimental data on fine grained copper produced by equi-channel angular extrusion will be described, and the implications of the data for diffusion creep and superplasticity will be discussed.

引用

页码：4393 / 4398

页数：6

共 20 条

[1] ON THE VALIDITY OF THE HALL-PETCH RELATIONSHIP IN NANOCRYSTALLINE MATERIALS [J].

CHOKSHI, AH ;

ROSEN, A ;

KARCH, J ;

GLEITER, H .

SCRIPTA METALLURGICA, 1989, 23 (10) :1679-1683

[2] Diffusion, diffusion creep and grain growth characteristics of nanocrystalline and fine-grained monoclinic, tetragonal and cubic zirconia [J].

Chokshi, AH .

SCRIPTA MATERIALIA, 2003, 48 (06) :791-796

[3]

CHOKSHI AH, IN PRESS

[4] Mechanisms for grain size hardening and softening in Zn [J].

Conrad, H ;

Narayan, J .

ACTA MATERIALIA, 2002, 50 (20) :5067-5078

[5] THE STRAIN AND GRAIN-SIZE DEPENDENCE OF THE FLOW-STRESS OF COPPER [J].

HANSEN, N ;

RALPH, B .

ACTA METALLURGICA, 1982, 30 (02) :411-417

[6] Observations of grain boundary structure in submicrometer-grained Cu and Ni using high-resolution electron microscopy [J].

Horita, Z ;

Smith, DJ ;

Nemoto, M ;

Valiev, RZ ;

Langdon, TG .

JOURNAL OF MATERIALS RESEARCH, 1998, 13 (02) :446-450

[7]

KOTTADA RS, IN PRESS

[8]

Meyers MA, 1999, MECH BEHAV MAT

[9] Microstructures and boundary populations in materials produced by equal channel angular extrusion [J].

Mishin, OV ;

Jensen, DJ ;

Hansen, N .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 342 (1-2) :320-328

[10] MICROHARDNESS OF NANOCRYSTALLINE PALLADIUM AND COPPER PRODUCED BY INERT-GAS CONDENSATION [J].

NIEMAN, GW ;

WEERTMAN, JR ;

SIEGEL, RW .

SCRIPTA METALLURGICA, 1989, 23 (12) :2013-2018

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