GRAIN-BOUNDARIES DURING SUPERPLASTIC DEFORMATION

被引：53
作者：
VALIEV, RZ
KAIBYSHEV, OA
KHANNANOV, SK
机构：
来源：
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1979年 / 52卷 / 02期
关键词：
D O I：
10.1002/pssa.2210520212
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structure and properties of grain boundaries are considered during superplastic deformation on the basis of recent concepts of the interaction between lattice dislocations and grain boundaries. It is shown that the boundaries contain both, lattice and grain boundary dislocations. The presence of these extraneous defects leads to an increase of grain boundary energy; there is an increase of the vacancy concentration and enhancement of the diffusion coefficient in the boundaries with non‐equilibrium structure. The results of numerical estimation of dislocation density and of the change in diffusion parameters agree well with the established experimental data. Copyright © 1979 WILEY‐VCH Verlag GmbH & Co. KGaA
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页码：447 / 453
页数：7
相关论文
共 22 条
[1]  
[Anonymous], 2012, CRYSTAL DEFECTS CRYS
[2]  
ASHBY MF, 1969, PHIL MAG, V17, P757
[3]  
BARO G, 1972, Z METALLKD, V63, P384
[4]   DEFORMATION ENHANCED GRAIN-GROWTH IN A SUPERPLASTIC SN-1PERCENT BI ALLOY [J].
CLARK, MA ;
ALDEN, TH .
ACTA METALLURGICA, 1973, 21 (09) :1195-1206
[5]   INTERACTION OF LATTICE DISLOCATIONS WITH GRAIN-BOUNDARIES [J].
DARBY, TP ;
SCHINDLER, R ;
BALLUFFI, RW .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1978, 37 (02) :245-256
[6]  
EDINGTON JW, 1976, PROG MATER SCI, V21, P51
[7]  
Friedel J., 1967, DISLOCATIONS
[8]  
GRABSKII MV, 1975, STRUKTURNAYA SVERKHP
[9]  
Hirth J.P., 1982, THEORY DISLOCATIONS
[10]   NATURE OF SUPERPLASTIC DEFORMATION [J].
KAIBYSHEV, OA ;
VALIEV, RZ ;
ASTANIN, VV .
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1976, 35 (01) :403-413
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