Strain hardening of heavily cold-worked metals

Technical Report · Fri Jan 01 00:00:00 EST 1982

DOI:https://doi.org/10.2172/6620317· OSTI ID:6620317

Hecker, S S; Stout, M G

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6620317
• Report Number(s): LA-UR-82-3446; CONF-821049-7; ON: DE83003544
• Resource Relation: Conference: TMS/AIME fall meeting, St. Louis, MO, USA, 24 Oct 1982; Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

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