Dataset icon

Dataset

Prismatic, basal, and slip strengths of commercially pure Zr by micro-cantilever tests

Documentation:
This study aimed to measure the critical resolved shear strength (CRSS) of individual slip systems in a polycrystalline, commercially pure zirconium sample. The slip strengths of basal ⟨a⟩, prism ⟨a⟩, and pyramidal ⟨c+a⟩ systems in zirconium were determined using micro-cantilever testing. Single-crystal cantilevers ranging from 0.5 µm to 10 µm wide, oriented for single slip, were prepared using focused ion beam (FIB) machining and deflected using a nanoindenter. The critical resolved shear stress (τ_crss) was determined by fitting a crystal plasticity finite element model to the experimental load-displacement data from these micro-bending tests. All three slip systems in alpha-Zr exhibit a marked size effect in bending, described by the relationship CRSS(W) = τ₀ + AWⁿ, where W is the cantilever width, τ₀ is the CRSS at the macroscale, and n = -1. The exponent of approximately -1 aligns with hardening caused by the back stress generated by dislocations piling up at a diffuse barrier, resulting from stress reduction near the neutral axis. The macroscale CRSS values were successfully used to simulate deformation in a conventional macroscopic compression test.
Version:
1

Actions

  • Cite

  • Print

Authors/Creators

More by this author/creator
Department:
Department of Materials
Role:
Principal Investigator (PI), Creator

More from this funder
Funder identifier:
https://ror.org/0439y7842
Funding agency for:
Wilkinson, A
Wilkinson, A
Wilkinson, A
Grant:
EP/H018921/1
EP/K039237/1
EP/K034332/1

Publisher:
University of Oxford
Publication date:
2015
Version number:
1
DOI:
Data collected:
2013 - 2014

Language:
English
Keywords:
Subjects:
Pubs id:
1480229
UUID:
uuid:3bf98bc2-ddaf-45a3-9a6c-22e70e6f6ab2
Local pid:
pubs:1480229
Deposit date:
2015-04-20
ARK identifier:

Views and Downloads

Views and downloads will return soon





If you are the owner of this record, you can report an update to it here: Report update to this record

TO TOP