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On the Stress Dependence of Steady State Creep Rate in Alpha Iron
Author(s) -
Čadek J.,
Pahutová M.,
Ryš P.
Publication year - 1969
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19690360135
Subject(s) - creep , dislocation , stress (linguistics) , materials science , steady state (chemistry) , dislocation creep , mechanics , metallurgy , composite material , physics , chemistry , linguistics , philosophy
Stress dependence of steady state creep rate in alpha iron is analysed assuming that the non‐conservative motion of jogs on screw dislocations is the rate controlling process. It is shown that the moving screw dislocation density ϱ s is a more complicated and more sensitive function of stress than the total dislocation density ϱ. The density ϱ s increases, reaches a maximum and then decreases again with the increasing stress. The model of creep based on non‐conservative motion of jogs on screw dislocations is in a good qualitative agreement with experimental results.