Slip system activity and lattice rotation in polycrystalline copper during uniaxial tension
Publication Name
Journal of Materials Research and Technology
Abstract
The heterogeneous evolution of intragranular strain within polycrystalline copper grains is evaluated by in-situ electron back-scattering diffraction during uniaxial tension. Deformation heterogeneity between grains causes a proliferation of slip bands within grains and leads to lattice rotation within grains. The magnitude of intragranular orientation gradient development caused by lattice rotation is dependent on the initial grain orientation as well as grain interactions with its local neighbourhood. Uniaxial tensile deformation is accommodated by the activation of coplanar and non-coplanar slip systems with the highest and second highest Schmid factor values. Non-coplanar slip is predominantly observed in unstable 011 and “Other” (i.e.- those that do not belong to the 111, 001, and 011 fibres) grains. Viscoplastic self-consistent simulations revealed that the interactions with the homologous effective mediums provide additional rotation pathways for unstable 011 and “Other” grains to rotate towards more stable 111 and 001 orientations.
Open Access Status
This publication may be available as open access
Volume
18
First Page
508
Last Page
519
Funding Number
DP170103092
Funding Sponsor
Australian Research Council