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Plasticity of high purity iron single crystals (I) 1. work hardening
Author(s) -
Novák V.,
Kadečková S.,
Šesták B.,
Zárubová N.
Publication year - 1984
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170190609
Subject(s) - atmospheric temperature range , materials science , critical resolved shear stress , work hardening , hardening (computing) , condensed matter physics , shear (geology) , lattice (music) , negative temperature , thermodynamics , crystallography , composite material , chemistry , shear rate , microstructure , physics , viscosity , acoustics , layer (electronics)
High purity iron single crystals were deformed in tension in the temperature range 4.2 to 473 K. Work‐hardening characteristics were determined and the plastic behaviour in dependence on temperature, strain rate and crystal orientation isz discussed. The transition temperature between low‐temperature and intermediate‐temperature deformation regimes was found to be ≅ 250 K, the critical temperature estimated from the temperature dependence of the critical resolved shear stress is ≅ 380 K. A hump on the temperature dependence of the critical resolved shear stress was observed in the vicinity of 250 K. These observations are qualitatively explained by special mobilities of dislocations in b.c.c. lattice.