Steady state power law creep resulting from dislocation substructure saturation being approached at higher stress

被引：3

作者：

Chandler, H. D. ^{[1
]}

机构：

[1] Univ Witwatersrand, Sch Mech Ind & Aeronaut Engn, PO 2050 WITS, Johannesburg, Gauteng, South Africa

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 771卷

关键词：

Power law creep; Structure; Activation energy; Activation entropy;

D O I：

10.1016/j.msea.2019.138622

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Steady state power-law creep is described assuming dislocation density tends to a saturated state at higher stresses as ln(stress). If the flow activation energy also follows this trend, substituting it into the Stokes - Einstein flow equation leads to strain rate being a power law function of stress.

引用

页数：3

共 30 条

[1] SOME OBSERVATIONS ON THE RELATION BETWEEN DISLOCATION SUBSTRUCTURE AND POWER LAW BREAKDOWN IN CREEP
PHARR, GM
[J]. SCRIPTA METALLURGICA, 1981, 15 (07): : 713 - 717
[2] ROLE OF PEIERLS STRESS IN POWER-LAW DISLOCATION CREEP
WANG, JN
NIEH, TG
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1995, 202 (1-2): : 52 - 56
[3] Power-Law Creep from Discrete Dislocation Dynamics
Keralavarma, Shyam M.
Cagin, T.
Arsenlis, A.
Benzerga, A. Amine
[J]. PHYSICAL REVIEW LETTERS, 2012, 109 (26)
[4] THEORETICAL EQUATION FOR STEADY-STATE DISLOCATION CREEP IN A MATERIAL HAVING A THRESHOLD STRESS
GITTUS, JH
[J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1975, 342 (1629): : 279 - 287
[5] Spontaneous dislocation annihilation explains the breakdown of the power law of steady state deformation
Blum, W
Roters, F
[J]. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2001, 184 (01): : 257 - 261
[6] STEADY-STATE POWER-LAW CREEP IN HETEROGENEOUS ALLOYS WITH COARSE MICROSTRUCTURES
CHEN, IW
ARGON, AS
[J]. ACTA METALLURGICA, 1979, 27 (05): : 785 - 791
[7] STEADY-STATE CREEP IN ALPHA-IRON AS DESCRIBED IN TERMS OF EFFECTIVE STRESS AND DISLOCATION DYNAMICS
PAHUTOVA, M
ORLOVA, A
KUCHAROVA, K
CADEK, J
[J]. PHILOSOPHICAL MAGAZINE, 1973, 28 (05) : 1099 - 1110
[8] Contributions to internal stress from free dislocations and from substructure boundaries in dislocation structure formed in high temperature creep
Orlova, Alena
Dobes, Ferdinand
[J]. MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE V, 2008, 567-568 : 173 - 176
[9] Steady-state creep of a pressurized thick cylinder in both the linear and the power law ranges
Holm Altenbach
Y. Gorash
K. Naumenko
[J]. Acta Mechanica, 2008, 195 : 263 - 274
[10] STEADY-STATE POWER-LAW CREEP IN INCLUSION MATRIX COMPOSITE-MATERIALS
HERVE, E
DENDIEVEL, R
BONNET, G
[J]. ACTA METALLURGICA ET MATERIALIA, 1995, 43 (11): : 4027 - 4034

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