Deformation mechanisms of a micro-sized austenitic stainless steel with fine grains

G. P. Zhang, K. Takashima, M. Shimojo, Y. Higo

Research output: Contribution to journalConference articlepeer-review


In this study, deformation behavior of fine-grained austenitic stainless steel micro-cantilever beams was investigated using a newly developed testing machine for micro-sized specimens. The microbeams were deformed to different strain hardening stages of the material, and then the detailed deformation behavior on the specimen surface at the corresponding strain hardening stage was examined by scanning electron microscopy. Two deformation mechanisms corresponding to different strain hardening stages were found in the micro-sized austenitic stainless steel with fine grains. The dislocation slip mechanism characterized by the extensive dislocation slips and their interaction with grain boundaries resulted in the stage I strain hardening. With increasing deformation, the grain boundary sliding (GBS) mechanism at the stage II and subsequently intergranular cracking occurred. The differences in stress condition and work-hardening behavior on the top tension-side and rear compression-side surfaces of the micro-cantilever beam resulted in the different deformation behavior.

Original languageEnglish
Pages (from-to)EE5101-EE5106
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 2001
Externally publishedYes
EventMaterial Science of Microelectromechanical Systems (MEMS) Devices III - Boston, MA, United States
Duration: 2000 Nov 272000 Nov 28

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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