In Situ Studies on the Irradiation-Induced Twin Boundary-Defect Interactions in Cu

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  • C. Fan
  • Jin Li
  • Zhe Fan
  • H. Wang
  • X. Zhang


Original languageEnglish
Pages (from-to)5172-5180
Journal / PublicationMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number11
Publication statusPublished - 1 Nov 2017
Externally publishedYes


Polycrystalline Cu films with nanoscale annealing twins are subjected to in situ Kr++ ion irradiation at room temperature inside a transmission electron microscope up to a dose of 1 displacement-per-atom. Radiation induces prominent migration of incoherent twin boundaries. Depending on twin thickness, three types of twin boundary evolutions are observed, including rapid detwinning, gradual detwinning, and self-healing. The mechanism of twin thickness-dependent evolution of microstructures is discussed. This study provides further evidence on twin boundary-defect interactions and may assist the design of radiation-tolerant twinned metallic materials.

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