On the reversibility of dislocation slip during small scale low cycle fatigue

被引：32

作者：

Kirchlechner, C. ^{[1
,2
]}

Imrich, P. J. ^{[3
]}

Liegl, W. ^{[3
]}

Poernbacher, J. ^{[2
]}

Micha, J. -S. ^{[4
,5
]}

Ulrich, O. ^{[4
,5
]}

Motz, C. ^{[6
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

[2] Univ Leoben, Dept Mat Phys, A-8700 Leoben, Austria

[3] Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria

[4] CEA Grenoblel Inst Nanosc & Cryogenie, F-38043 Grenoble 9, France

[5] ESRF, CRG IF BM32, F-38043 Grenoble 9, France

[6] Univ Saarland, Dept Mat Sci, D-66041 Saarbrucken, Germany

来源：

ACTA MATERIALIA | 2015年 / 94卷

关键词：

Size effect; Synchrotron diffraction; Micromechanics; Copper; Fatigue; LENGTH-SCALE; PLASTICITY; COPPER; BEAM; SIZE; MICRODIFFRACTION; DIFFRACTION; CRYSTALS; BEHAVIOR; DAMAGE;

D O I：

10.1016/j.actamat.2015.04.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of low cycle fatigue damage in copper is studied by in situ micro Laue diffraction. Free standing single crystalline micro-cantilevers with a cross-section of 10 x 10 mu m(2) were loaded in displacement controlled mode with a surface strain amplitude up to 5%. The point to point misorientation and the diffraction peak width as a measure of geometrically necessary dislocation density was analyzed locally during deformation and globally after 0, 1/4, 1/2, 3/4, 1 and multiples up to a maximum of 22 full cycles. Two different behaviors were observed (i) samples geometrically suppressing cross-slip show a steady state deformation pattern with dislocations in a pile-up. (ii) The sample with cross-slip does not reach a steady state with dislocations accumulating at the neutral plane. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：69 / 77

页数：9

共 33 条

[1]

[Anonymous], THESIS MONTANUNIVERS

[2]

[Anonymous], ZYKLISCHE PLASTIZITA

[3] Quantitative microdiffraction from deformed crystals with unpaired dislocations and dislocation walls [J].

Barabash, RI ;

Ice, GE ;

Walker, FJ .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (03) :1457-1464

[4] A search for evidence of strain gradient hardening in Au submicron pillars under uniaxial compression using synchrotron X-ray micro diffraction [J].

Budiman, A. S. ;

Han, S. M. ;

Greer, J. R. ;

Tamura, N. ;

Patel, J. R. ;

Nix, W. D. .

ACTA MATERIALIA, 2008, 56 (03) :602-608

[5] Mechanical and microstructural single-crystal Bauschinger effects: Observation of reversible plasticity in copper during bending [J].

Demir, Eralp ;

Raabe, Dierk .

ACTA MATERIALIA, 2010, 58 (18) :6055-6063

[6] Plasticity in small-sized metallic systems: Intrinsic versus extrinsic size effect [J].

Greer, Julia R. ;

De Hosson, Jeff Th. M. .

PROGRESS IN MATERIALS SCIENCE, 2011, 56 (06) :654-724

[7]

Ice GE, 2007, DISCLOC SOLIDS, V13, P499, DOI 10.1016/S1572-4859(07)80011-8

[8] Tutorial on x-ray microLaue diffraction [J].

Ice, Gene E. ;

Pang, Judy W. L. .

MATERIALS CHARACTERIZATION, 2009, 60 (11) :1191-1201

[9] Dislocation microstructures in fine-grained Cu polycrystals fatigued at low amplitude [J].

Kawazoe, H ;

Yoshida, M ;

Basinski, ZS ;

Niewczas, M .

SCRIPTA MATERIALIA, 1999, 40 (05) :639-644

[10] Cyclic response of copper single crystal micro-beams [J].

Kiener, D. ;

Motz, C. ;

Grosinger, W. ;

Weygand, D. ;

Pippan, R. .

SCRIPTA MATERIALIA, 2010, 63 (05) :500-503

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