Taylor factors in materials with many deformation modes

Journal Article · Thu Aug 15 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00137-6· OSTI ID:271624

Mecking, H; Kocks, U F; Hartig, C ^[1]

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1. Los Alamos National Lab., NM (United States). Center for Materials Science

A Taylor factor (M) is frequently used to express a flow stress {sigma} measured in a polycrystal in terms of the critical resolved shear stress (CRSS) {tau} in the constituent single crystals. It is an average orientation factor which depends on the texture of the material and on the crystallographic nature of the assumed slip systems. When stress strain curves are analyzed, this Taylor factor is also commonly used to express the macroscopic strain in terms of the algebraic sum of crystallographic shears. As a result, the polycrystals strain hardening slope is proportional to M{sup 2}, and therefore rather sensitive to the assumed value of M. The strain hardening rate in single crystals, obtained by dividing the polycrystal value by M{sup 2}, provides useful information on the deformation mechanism and on constitutive relations to be used in polycrystal simulations.

• OSTI ID: 271624
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 4 Vol. 35; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTALLOGRAPHY
DEFORMATION
FLOW STRESS
ORIENTATION
PLASTICITY
POLYCRYSTALS
SLIP
STRAIN HARDENING
STRAIN RATE
STRAINS
STRESSES
TEXTURE
TWINNING