Details
| Original language | English |
|---|---|
| Pages (from-to) | 457-461 |
| Number of pages | 5 |
| Journal | Materials Science and Engineering A |
| Volume | 410-411 |
| Publication status | Published - 25 Nov 2005 |
| Externally published | Yes |
Abstract
We report on the fatigue behavior of ultrafine grained (UFG) copper obtained by equal channel angular extrusion (ECAE). Cyclic stress-strain response and fatigue life data were determined in fatigue tests conducted in the low-cycle fatigue (LCF) regime. The early stages of the fatigue process were examined in a scanning electron microscope equipped with a small-scale load frame that allowed for in situ fatigue observations. The ECAE route 16E gives superior fatigue performances as it provides for stable cyclic stress-strain response and more homogeneous plastic deformation than routes that are composed of lower number of ECAE passes. Still, the in situ fatigue tests indicated that fatigue damage occurs on a very localized scale, and thus, additional strengthening mechanisms need to be exploited to obtain UFG materials that display enhanced microstructural stability.
Keywords
- Cyclic stability, Equal channel angular extrusion, Fatigue behavior, Microstructure
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materials Science and Engineering A, Vol. 410-411, 25.11.2005, p. 457-461.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Cyclic stress-strain response and low-cycle fatigue damage in ultrafine grained copper
AU - Maier, H. J.
AU - Gabor, P.
AU - Karaman, I.
N1 - Funding Information: This study was supported by Deutsche Forschungsgemeinschaft, contract no. MA1175/17-1, within the Research Unit Program “Mechanische Eigenschaften und Grenzflächen ultrafeinkörniger Werkstoffe”. The U.S. part of the research was supported by the National Science Foundation contract CMS 01-34554, Solid Mechanics and Materials Engineering Program, Directorate of Engineering, Arlington, Virginia.
PY - 2005/11/25
Y1 - 2005/11/25
N2 - We report on the fatigue behavior of ultrafine grained (UFG) copper obtained by equal channel angular extrusion (ECAE). Cyclic stress-strain response and fatigue life data were determined in fatigue tests conducted in the low-cycle fatigue (LCF) regime. The early stages of the fatigue process were examined in a scanning electron microscope equipped with a small-scale load frame that allowed for in situ fatigue observations. The ECAE route 16E gives superior fatigue performances as it provides for stable cyclic stress-strain response and more homogeneous plastic deformation than routes that are composed of lower number of ECAE passes. Still, the in situ fatigue tests indicated that fatigue damage occurs on a very localized scale, and thus, additional strengthening mechanisms need to be exploited to obtain UFG materials that display enhanced microstructural stability.
AB - We report on the fatigue behavior of ultrafine grained (UFG) copper obtained by equal channel angular extrusion (ECAE). Cyclic stress-strain response and fatigue life data were determined in fatigue tests conducted in the low-cycle fatigue (LCF) regime. The early stages of the fatigue process were examined in a scanning electron microscope equipped with a small-scale load frame that allowed for in situ fatigue observations. The ECAE route 16E gives superior fatigue performances as it provides for stable cyclic stress-strain response and more homogeneous plastic deformation than routes that are composed of lower number of ECAE passes. Still, the in situ fatigue tests indicated that fatigue damage occurs on a very localized scale, and thus, additional strengthening mechanisms need to be exploited to obtain UFG materials that display enhanced microstructural stability.
KW - Cyclic stability
KW - Equal channel angular extrusion
KW - Fatigue behavior
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=28944437231&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2005.08.079
DO - 10.1016/j.msea.2005.08.079
M3 - Article
AN - SCOPUS:28944437231
VL - 410-411
SP - 457
EP - 461
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
SN - 0921-5093
ER -