Strain hardening and plasticity of low-carbon steels with a heterophase structure: I. Strain hardening characteristics of steels during uniaxial tension

The strain hardening characteristics of low-carbon 10kp, 05G2S2, and 05G2R steels with a heterophase structure (ferritic-martensitic, ferritic-bainitic, ferritic-pearlitic) formed upon quenching from the intercritical temperature range and upon normalization are studied during uniaxial tension. The...

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Bibliographic Details
Published in:Russian metallurgy Metally 2009-10, Vol.2009 (5), p.406-411
Main Authors: Shveikin, V. P., Smirnov, S. V.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Deformation
Internal friction
Low carbon steels
Materials Science
Metallic Materials
Plasticity
Quenching
Strain hardening
Stress strain curves
Stress-strain relationships
Structural steels
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Summary:The strain hardening characteristics of low-carbon 10kp, 05G2S2, and 05G2R steels with a heterophase structure (ferritic-martensitic, ferritic-bainitic, ferritic-pearlitic) formed upon quenching from the intercritical temperature range and upon normalization are studied during uniaxial tension. The dislocation structures of these steels are examined by electron microscopy and internal friction, and the results obtained are used to explain the factors that cause the high strain-hardening rate of steels with a two-phase ferritic-martensitic structure. Stress-strain diagrams are constructed for steel samples that have various heterophase structures and are subjected to a small preliminary deformation (up to 10%); these diagrams can be used to compare the strain-hardening characteristics of the steels.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029509050073