The role of Ta on twinnability in nanocrystalline Cu–Ta alloys

M. A. Bhatia, M. Rajagopalan, K. A. Darling, M. A. Tschopp, Kiran Solanki

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Nanostructured Cu–Ta alloys show promise as high-strength materials in part due to their limited grain growth. In the present study, we elucidate the role of Ta on the transition from deformation twinning to dislocation-mediated slip mechanisms in nanocrystalline Cu through atomistic simulations and transmission electron microscopy characterization. In particular, computed generalized stacking fault energy curves show that as Ta content increases there is a shift from twinning to slip-dominated deformation mechanisms. Furthermore, heterogeneous twinnability from microstructural defects decreases with an increase in Ta. The computed effect of Ta on plasticity is consistent with the HRTEM observations.

Original languageEnglish (US)
Pages (from-to)48-54
Number of pages7
JournalMaterials Research Letters
Issue number1
StatePublished - Jan 2 2017


  • Nanocrystalline
  • TEM
  • dislocation
  • twinning

ASJC Scopus subject areas

  • Materials Science(all)


Dive into the research topics of 'The role of Ta on twinnability in nanocrystalline Cu–Ta alloys'. Together they form a unique fingerprint.

Cite this