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Title: Strain hardening of heavily cold-worked metals

Strain hardening of heavily cold-worked metals It is demonstrated that strain hardening in torsion cannot be correlated with axisymmetric deformation by the von Mises effective stress strain criterion. In fcc materials, the flow stress levels and strain hardening rates are typically lower in torsion and saturation, only at lower stress levels. In bcc iron, a low saturtion stress is observed for torsion, whereas linear hardening is observed for axisymmetric extension. Much of the discrepancy in flow curves can be explained by texture. It is demonstrated that a crystallographic effective stress-strain criterion based on evolving average Taylor factors provides the proper magnitude correction for torsional flow curves in fcc materials. The simple crystallographic analysis does not fully explain the hardening response following deformation path changes and multidirectional loading. 96 references, 42 figures.
Authors: ;
Publication Date:
OSTI Identifier:6620317
Report Number(s):LA-UR-82-3446; CONF-821049-7
ON: DE83003544
DOE Contract Number:W-7405-ENG-36
Resource Type:Technical Report
Data Type:
Resource Relation:Conference: TMS/AIME fall meeting, St. Louis, MO, USA, 24 Oct 1982; Other Information: Portions of document are illegible
Research Org:Los Alamos National Lab., NM (USA)
Country of Publication:United States
Language:English
Subject: 36 MATERIALS SCIENCE; ALUMINIUM; STRAIN HARDENING; BRASS; COPPER; IRON BASE ALLOYS; METALS; NICKEL; STEELS; COLD WORKING; EXPERIMENTAL DATA; TITANIUM ADDITIONS; TORSION; TUBES; ALLOYS; COPPER ALLOYS; COPPER BASE ALLOYS; DATA; ELEMENTS; FABRICATION; HARDENING; INFORMATION; IRON ALLOYS; MATERIALS WORKING; NUMERICAL DATA; TITANIUM ALLOYS; TRANSITION ELEMENTS; ZINC ALLOYS 360103* -- Metals & Alloys-- Mechanical Properties