In-situ observation of dislocation dynamics near heterostructured interfaces

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

96 Scopus Citations
View graph of relations

Author(s)

  • Hao Zhou
  • Chongxiang Huang
  • Xuechao Sha
  • Lirong Xiao
  • Heinz Werner Höppel
  • Mathias Göken
  • Xiaolei Wu
  • Kei Ameyama
  • Xiaodong Han

Detail(s)

Original languageEnglish
Pages (from-to)376-382
Journal / PublicationMaterials Research Letters
Volume7
Issue number9
Publication statusPublished - 8 Jan 2019
Externally publishedYes

Link(s)

Abstract

There has been a long-standing controversy on how dislocations interact with interfaces. Here we report in-situ observations that in a Cu-brass heterostructured TEM film Frank-Read sources are the primary dislocation sources. They were dynamically formed and deactivated throughout the deformation in grain interior, which has never been reported before. This observation indicates that strain gradient near interfaces cannot be quantitatively related to the density gradient of geometrically necessary dislocations, and it was primarily produced by Frank-Read source gradient instead of dislocation pile-ups. These findings provide new insights on how to design heterostructured interfaces to enhance mechanical properties.

Research Area(s)

  • Deformation mechanism, Frank-Read source, Heterostructured materials, In-situ TEM

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

In-situ observation of dislocation dynamics near heterostructured interfaces. / Zhou, Hao; Huang, Chongxiang; Sha, Xuechao et al.
In: Materials Research Letters, Vol. 7, No. 9, 08.01.2019, p. 376-382.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Download Statistics

No data available