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Observation of annealing twin nucleation at triple lines in nickel during grain growth

Brian Lin 1 Yuan Jin 2 Christopher M. Hefferan 3 Shiu Fai Li 3 Jonathan Lind 3 Robert M. Suter 3 Marc Bernacki 2 Nathalie Bozzolo 2 Anthony D. Rollett 1 Gregory S. Rohrer 1, *
* Corresponding author
1 Department of Material Science and Engineering
2 CEMEF - Centre de Mise en Forme des Matériaux
3 Department of Physics [Pittsburgh]
Abstract : Three-dimensional near-field high-energy X-ray diffraction microscopy has been used to observe the formation of new twinned grains in high purity Ni during annealing at 800 °C. In the fully recrystallized microstructure annealed at 800 °C, twinned grains form along triple lines. Both the grain boundary character and the grain boundary dihedral angles were measured before and after the twin formed. These measurements make it possible to show that although each new twinned grain increases the total grain boundary area, it reduces the total grain boundary energy.
Keywords : Grain boundary energy Diffraction Nickel Twins
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Submitted on : Monday, August 24, 2015 - 11:27:38 AM
Last modification on : Wednesday, March 17, 2021 - 5:20:03 PM

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Brian Lin, Yuan Jin, Christopher M. Hefferan, Shiu Fai Li, Jonathan Lind, et al.. Observation of annealing twin nucleation at triple lines in nickel during grain growth. Acta Materialia, Elsevier, 2015, 99, pp.63-68. ⟨10.1016/j.actamat.2015.07.041⟩. ⟨hal-01186079⟩

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