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Visualization and validation of twin nucleation and early-stage growth in magnesium.
Jiang, Lin; Gong, Mingyu; Wang, Jian; Pan, Zhiliang; Wang, Xin; Zhang, Dalong; Wang, Y Morris; Ciston, Jim; Minor, Andrew M; Xu, Mingjie; Pan, Xiaoqing; Rupert, Timothy J; Mahajan, Subhash; Lavernia, Enrique J; Beyerlein, Irene J; Schoenung, Julie M.
Afiliación
  • Jiang L; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA.
  • Gong M; Materials & Structural Analysis Division, Thermo Fisher Scientific, Hillsboro, OR, 97124, USA.
  • Wang J; State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240, China.
  • Pan Z; Department of Mechanical & Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
  • Wang X; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA.
  • Zhang D; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA.
  • Wang YM; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA.
  • Ciston J; Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
  • Minor AM; Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94701, USA.
  • Xu M; Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94701, USA.
  • Pan X; Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.
  • Rupert TJ; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA.
  • Mahajan S; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA.
  • Lavernia EJ; Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA.
  • Beyerlein IJ; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA.
  • Schoenung JM; Department of Materials Science and Engineering, University of California, Davis, CA, 95616, USA.
Nat Commun ; 13(1): 20, 2022 Jan 10.
Article en En | MEDLINE | ID: mdl-35013175
ABSTRACT
The abrupt occurrence of twinning when Mg is deformed leads to a highly anisotropic response, making it too unreliable for structural use and too unpredictable for observation. Here, we describe an in-situ transmission electron microscopy experiment on Mg crystals with strategically designed geometries for visualization of a long-proposed but unverified twinning mechanism. Combining with atomistic simulations and topological analysis, we conclude that twin nucleation occurs through a pure-shuffle mechanism that requires prismatic-basal transformations. Also, we verified a crystal geometry dependent twin growth mechanism, that is the early-stage growth associated with instability of plasticity flow, which can be dominated either by slower movement of prismatic-basal boundary steps, or by faster glide-shuffle along the twinning plane. The fundamental understanding of twinning provides a pathway to understand deformation from a scientific standpoint and the microstructure design principles to engineer metals with enhanced behavior from a technological standpoint.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos