The microstructure and texture of torsion-reverse torsion experiments. [Al-1Mg]

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6041080

Rollett, A D; Lowe, T; Kocks, U F; Stout, M G

Recent experiments with short thin-walled tubes (Lindholm design) tested in torsion and reverse torsion have confirmed both the persistence of a shear texture at zero net strain and the restoration of the grain shape. Calculations of theoretical texture development using a code based on the Bishop and Hill analysis have confirmed the reversibility of texture development when Taylor-based models are used. This code includes the effect or Relaxed Constraints and uses a nonlinear strain rate sensitivity to resolve the ambiguity of slip system choice. Calculations performed with the Asaro-Needleman code do leave a small residual texture at zero net strain. The conclusion is that there is sometimes an irreversible component of texture development that is not accounted for by the geometry of plastic deformation. 11 refs., 6 figs.

• Research Organization: Los Alamos National Lab., NM (USA); Sandia National Labs., Livermore, CA (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6041080
• Report Number(s): LA-UR-87-3618; CONF-8709172-1; ON: DE88001801
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
CRYSTAL STRUCTURE
GRAIN ORIENTATION
HARDENING
IRON ADDITIONS
IRON ALLOYS
MAGNESIUM ALLOYS
MICROSTRUCTURE
ORIENTATION
SHEAR
SILICON ADDITIONS
SILICON ALLOYS
STRAIN HARDENING
TEXTURE
TORSION
TUBES