Influence of texture on Hall–Petch relationships in an Mg alloy

Journal Article · Mon Dec 01 04:00:00 EST 2014 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2014.08.023· OSTI ID:1327045

Wang, Yi; Choo, Hahn

The influence of changes in crystallographic texture on the Hall–Petch (H–P) relationship for an Mg alloy was investigated. First, the texture variations were facilitated by changing the uniaxial tensile loading orientation with respect to the normal direction of the rolled Mg plate. With a strong plane texture of the as-received material, the initial dominant deformation mechanisms were systematically varied from the basal slip and prismatic slip to extension twinning, as well as combinations thereof. Second, different grain sizes were produced for each loading orientation through isochronal annealing at various temperatures up to 773 K while closely monitoring grain size and texture distributions. The experimental results are presented for the grain growth kinetics during annealing, changes in yielding behavior as a function of grain size and initial texture, and H–P relationship as a function of the texture. Moreover, the effects of changes in texture and dominant deformation mechanism on H–P parameters – namely, friction stress, σo, and strength coefficient, kσ – are discussed. Finally, H–P relationships for each individual deformation mode including basal, prismatic and pyramidal slips as well as extension twin are identified.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: NSF
• OSTI ID: 1327045
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 81; ISSN 1359-6454
• Publisher: Elsevier
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE