Relationship between dislocation microstructure and flow stress during cyclic deformation in Al single crystals

被引：0

作者：

Fujii, Toshiyuki ^{[1
]}

Uju, Shizuma ^{[1
]}

Tanaka, Hiroyuki

Murayama, Toru ^{[1
]}

Watanabe, Chihiro

Onak, Sumu

Kato, Masaharu

机构：

[1] Tokyo Inst Technol, Dept Innovat & Engineered Mat, Midori Ku, Yokohama, Kanagawa 2268502, Japan

来源：

PLASTICITY, FAILURE AND FATIGUE IN STRUCTURAL MATERIALS-FROM MACRO TO NANO: PROCEEDINGS OF THE HAEL MUGHRABI HONORARY SYMPOSIUM | 2008年

关键词：

cyclic deformation; persistent slip bands; labyrinth structure; cyclic flow stress; composite model;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Al single crystals with a multiple slip orientation were cyclically deformed under constant plastic-strain amplitudes at room temperature. A sequential change, i.e. initial hardening, intermediate softening, and secondary hardening, was obtained in cyclic hardening curves. The dislocation microstructure was characterized by the labyrinth structure, which consists of two sets of mutually perpendicular {100} walls. It was concluded that an analysis based upon Mughrabi's composite model to relate the macroscopic cyclic flow stress to the local flow stresses is applicable not only to the case of PSBs formed by single slip but also to the case of the labyrinth structure formed by multiple slip.

引用

页码：123 / 127

页数：5

共 50 条

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