More Like this

1. Local hardening and asymmetric twin growth by twin-twin interactions in a Mg alloy

   https://doi.org/10.1016/j.jma.2022.11.008  

   Yaddanapudi, Krishna ; Kumar, Mariyappan Arul ; Wang, Jiaxiang ; Wang, Xin ; Rupert, Timothy J. ; Lavernia, Enrique J. ; Schoenung, Julie M. ; Beyerlein, Irene J. ; Mahajan, Subhash ( January 2023 , Journal of Magnesium and Alloys)
2. Twin peaks

   https://doi.org/10.1002/rsa.20883  

   Burdzy, Krzysztof ; Pal, Soumik ( August 2019 , Random Structures & Algorithms)

   We study random labelings of graphs conditioned on a small number (typically one or two) peaks, that is, local maxima. We show that the boundaries of level sets of a random labeling of a square with a single peak have dimension 2, in a suitable asymptotic sense. The gradient line of a random labeling of a long ladder graph conditioned on a single peak consists mostly of straight line segments. We show that for some tree‐graphs, if a random labeling is conditioned on exactly two peaks then the peaks can be very close to each other. We also study random labelings of regular trees conditioned on having exactly two peaks. Our results suggest that the top peak is likely to be at the root and the second peak is equally likely, more or less, to be any vertex not adjacent to the root.

    

   more » « less
3. Atomic-level study of twin–twin interactions in hexagonal metals

   https://doi.org/10.1557/jmr.2020.65  

   Gong, Mingyu ; Wu, Wenqian ( July 2020 , Journal of Materials Research)

   null (Ed.)

   Twin–twin interactions (TTIs) take place when multiple twinning modes and/or twin variants are activated and interact with each other. Twin–twin junctions (TTJs) form and affect subsequent twinning/detwinning and dislocation slip, which is particularly important in determining mechanical behavior of hexagonal metals because twinning is one major deformation mode. Atomic-level study, including crystallographic analysis, transmission electronic microscopy (TEM), and molecular dynamics (MD) simulations, can provide insights into understanding the process of TTIs and structural characters associated with TTJs. Crystallographic analysis enables the classification of TTIs and the prediction of possible interfaces of twin–twin boundaries (TTBs), characters of boundary dislocations, and possible reactions of twinning dislocations and lattice dislocations at TTBs. MD simulations can explore the process of TTIs, microstructures of TTJs, atomic structures of TTBs, and stress fields associated with TTJs. The predictions based on crystallographic analysis and the findings from MD can be partially verified by TEM. More importantly, these results provide explanation for microstructural characters of TTJs and guidance for further TEM characterizations. 

   more » « less
4. Crystallographic characters of {11¯22} twin-twin junctions in titanium

   https://doi.org/10.1080/09500839.2017.1402132  

   Xu, Shun ; Gong, Mingyu ; Xie, Xinyan ; Liu, Yue ; Schuman, Christophe ; Lecomte, Jean-Sébastien ; Wang, Jian ( November 2017 , Philosophical Magazine Letters)
5. Minimal mirror twin Higgs

   https://doi.org/10.1007/JHEP11(2016)172  

   Barbieri, Riccardo ; Hall, Lawrence J. ; Harigaya, Keisuke ( November 2016 , Journal of High Energy Physics)