Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals

Pedro Peralta; K. Obergfell; L. Lianes; C. Laird; T. E. Mitchell

Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals

Pedro Peralta, K. Obergfell, L. Lianes, C. Laird, T. E. Mitchell

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Fatigue tests were carried out on copper polycrystals that had a texture with strong components along directions inside the standard stereographic triangle (single slip orientations in monocrystals). The experiments showed that this "single slip" texture, ramp loading as a mechanical pretreatment and extended cycling at a given stress to insure saturation provide the conditions to obtain a plateau in the Cyclic Stress-Strain Curve (CSSC) of copper polycrystals in a reproducible fashion. Transmission Electron Microscopy (TEM) studies revealed the presence of numerous Persistent Slip Bands (PSB's) in samples deformed within the plateau regime.

Original language	English (US)
Pages (from-to)	S247-S253
Journal	International Journal of Fatigue
Volume	21
Issue number	SUPPL. 1
State	Published - Sep 1999

Keywords

Cyclic stress-strain curve
Dislocation structures
Plateau
Polycrystals
Strain localization

ASJC Scopus subject areas

Modeling and Simulation
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

Cite this

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title = "Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals",

abstract = "Fatigue tests were carried out on copper polycrystals that had a texture with strong components along directions inside the standard stereographic triangle (single slip orientations in monocrystals). The experiments showed that this {"}single slip{"} texture, ramp loading as a mechanical pretreatment and extended cycling at a given stress to insure saturation provide the conditions to obtain a plateau in the Cyclic Stress-Strain Curve (CSSC) of copper polycrystals in a reproducible fashion. Transmission Electron Microscopy (TEM) studies revealed the presence of numerous Persistent Slip Bands (PSB's) in samples deformed within the plateau regime.",

keywords = "Cyclic stress-strain curve, Dislocation structures, Plateau, Polycrystals, Strain localization",

author = "Pedro Peralta and K. Obergfell and L. Lianes and C. Laird and Mitchell, {T. E.}",

note = "Funding Information: We are grateful to the Department of Energy for supporting this work under grant No DE-FG02-93-45188 and to the Laboratory for Research on the Structure of Matter at the University of Pennsylvania, which provided facility support. P. Peralta also acknowledges a Director-Funded Postdoctoral Fellowship from Los Alamos National Laboratory and a start-up grant from Arizona State University.",

year = "1999",

month = sep,

language = "English (US)",

volume = "21",

pages = "S247--S253",

journal = "International Journal of Fatigue",

issn = "0142-1123",

publisher = "Elsevier Limited",

number = "SUPPL. 1",

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TY - JOUR

T1 - Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals

AU - Peralta, Pedro

AU - Obergfell, K.

AU - Lianes, L.

AU - Laird, C.

AU - Mitchell, T. E.

N1 - Funding Information: We are grateful to the Department of Energy for supporting this work under grant No DE-FG02-93-45188 and to the Laboratory for Research on the Structure of Matter at the University of Pennsylvania, which provided facility support. P. Peralta also acknowledges a Director-Funded Postdoctoral Fellowship from Los Alamos National Laboratory and a start-up grant from Arizona State University.

PY - 1999/9

Y1 - 1999/9

N2 - Fatigue tests were carried out on copper polycrystals that had a texture with strong components along directions inside the standard stereographic triangle (single slip orientations in monocrystals). The experiments showed that this "single slip" texture, ramp loading as a mechanical pretreatment and extended cycling at a given stress to insure saturation provide the conditions to obtain a plateau in the Cyclic Stress-Strain Curve (CSSC) of copper polycrystals in a reproducible fashion. Transmission Electron Microscopy (TEM) studies revealed the presence of numerous Persistent Slip Bands (PSB's) in samples deformed within the plateau regime.

AB - Fatigue tests were carried out on copper polycrystals that had a texture with strong components along directions inside the standard stereographic triangle (single slip orientations in monocrystals). The experiments showed that this "single slip" texture, ramp loading as a mechanical pretreatment and extended cycling at a given stress to insure saturation provide the conditions to obtain a plateau in the Cyclic Stress-Strain Curve (CSSC) of copper polycrystals in a reproducible fashion. Transmission Electron Microscopy (TEM) studies revealed the presence of numerous Persistent Slip Bands (PSB's) in samples deformed within the plateau regime.

KW - Cyclic stress-strain curve

KW - Dislocation structures

KW - Plateau

KW - Polycrystals

KW - Strain localization

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M3 - Article

AN - SCOPUS:0033227613

SN - 0142-1123

VL - 21

SP - S247-S253

JO - International Journal of Fatigue

JF - International Journal of Fatigue

IS - SUPPL. 1

ER -

Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals

Abstract

Keywords

ASJC Scopus subject areas

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