Formation of dislocation structures during cyclic deformation in near-[001] multiple-slip-oriented copper single crystals

被引：6

作者：

Ma, Tianchang ^{[1
]}

Chahara, Kentaro ^{[1
,2
]}

Miyazawa, Tomotaka ^{[1
]}

Fujii, Toshiyuki ^{[1
]}

机构：

[1] Tokyo Inst Technol, Sch Mat & Chem Technol, 2-12-1 Ookayama,Meguro Ku, Tokyo 1528552, Japan

[2] Japan Ground Selfdef Force, Western Army Logist, 2215-47 Yoshida, Yoshinogari, Saga 8420031, Japan

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2022年 / 162卷

关键词：

Copper single crystal; Cyclic deformation; Multiple slip; Labyrinth structure; Cell structure; FATIGUE; BANDS; BEHAVIOR; METAL; DEPENDENCE; AMPLITUDE; STRESS; STRAIN; ALLOY;

D O I：

10.1016/j.ijfatigue.2022.106953

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Dislocation structures in [001]-oriented copper single crystals have historically been studied at relatively low plastic shear strain amplitudes (gamma(pl)). Herein, the dislocation structure is investigated across a wide gamma pl range of 1.7 . 10(-4)-1.7 . 10(-2). When gamma(pl) < 1.5 . 10(-2), the dislocation structure comprised a labyrinth with a set of parallel (100) and (001) walls. However, as gamma(pl) approached 1.5 . 10(-2), the dislocation structure changed to a cell structure to accommodate the higher plastic strain. The formation plane of the cell boundary depends on which slip system is activated as the primary slip system.

引用

页数：9

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