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On the change of dislocation structure during the postdeformation of cold worked molybdenum single crystals at elevated temperature
Author(s) -
Ritschel Ch.,
Luft A.,
Schulze D.
Publication year - 1978
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19780130709
Subject(s) - molybdenum , slip (aerodynamics) , materials science , dislocation , crystallography , homogeneous , softening , lüders band , cell structure , condensed matter physics , composite material , metallurgy , thermodynamics , chemistry , physics , biology , biological system
Molybdenum single crystals predeformed at low temperature ( T 1 ≦ 293 K) exhibit during tensile reloading at T 2 = 493 K pronounced work softening accompanied by stress serrations and localized slip. It is shown that the initial state for the development of coarse slip bands is the formation of narrow obstacle‐free slip channels. The change from the homogeneous dislocation structure to the cell structure proceeds in a heterogeneous and discontinuous manner.