Details
| Original language | English |
|---|---|
| Pages (from-to) | 3-13 |
| Number of pages | 11 |
| Journal | European Structural Integrity Society |
| Volume | 29 |
| Issue number | C |
| Publication status | Published - 2002 |
| Externally published | Yes |
Abstract
Stress-strain behavior and durability of cast 319 aluminum-copper alloys are studied at high temperatures and under thermo-mechanical fatigue (TMF), exposing rate sensitivity and microstructural changes. The decrease in strength during cycling was attributed to the significant coarsening of the precipitates at high temperatures, which was confirmed with transmission electron microscopy. The results show that the stress-strain response is similar under out-of-phase (OP) and in-phase (IP) thermo-mechanical fatigue. However, TMF-IP fatigue lives are substantially lower compared to TMF-OP lives, which are very close to the isothermal low cycle fatigue (LCF) life obtained at a similar inelastic strain range. In fact, it is observed that TMF IP loading induces significant creep damage, while transgranular fracture predominates in all other testing conditions.
Keywords
- cast aluminum, fracture mechanism, microstructural coarsening, stress-strain response, Thermo-mechanical fatigue
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Mechanics of Materials
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In: European Structural Integrity Society, Vol. 29, No. C, 2002, p. 3-13.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Thermo-mechanical fatigue behavior of cast 319 aluminum alloys
AU - Engler-Pinto, C. C.
AU - Sehitoglu, Huseyin
AU - Maier, H. J.
AU - Foglesong, T. J.
N1 - Funding Information: The authors would like to thank Dr. John E. Allison and John V. Lasecki, from Ford Research Laboratory, Dearborn, for their support of this research. Dr. Carlos Engler-Pinto is also grateful to Fundaqao de Amparo a Pesquisa do Estado de Sao Paulo - FAPESP, Sao Paulo, Brazil, for the partial post-doctoral fellowship granted. Some of the isothermal tests were conducted at Westmoreland Laboratory and AMTEL. The SEM investigations were completed at the Center for Microanalysis of Materials at the University of Illinois, which is supported by the United States Department of Energy under Grant No. DEFG02-9I-ER45439.
PY - 2002
Y1 - 2002
N2 - Stress-strain behavior and durability of cast 319 aluminum-copper alloys are studied at high temperatures and under thermo-mechanical fatigue (TMF), exposing rate sensitivity and microstructural changes. The decrease in strength during cycling was attributed to the significant coarsening of the precipitates at high temperatures, which was confirmed with transmission electron microscopy. The results show that the stress-strain response is similar under out-of-phase (OP) and in-phase (IP) thermo-mechanical fatigue. However, TMF-IP fatigue lives are substantially lower compared to TMF-OP lives, which are very close to the isothermal low cycle fatigue (LCF) life obtained at a similar inelastic strain range. In fact, it is observed that TMF IP loading induces significant creep damage, while transgranular fracture predominates in all other testing conditions.
AB - Stress-strain behavior and durability of cast 319 aluminum-copper alloys are studied at high temperatures and under thermo-mechanical fatigue (TMF), exposing rate sensitivity and microstructural changes. The decrease in strength during cycling was attributed to the significant coarsening of the precipitates at high temperatures, which was confirmed with transmission electron microscopy. The results show that the stress-strain response is similar under out-of-phase (OP) and in-phase (IP) thermo-mechanical fatigue. However, TMF-IP fatigue lives are substantially lower compared to TMF-OP lives, which are very close to the isothermal low cycle fatigue (LCF) life obtained at a similar inelastic strain range. In fact, it is observed that TMF IP loading induces significant creep damage, while transgranular fracture predominates in all other testing conditions.
KW - cast aluminum
KW - fracture mechanism
KW - microstructural coarsening
KW - stress-strain response
KW - Thermo-mechanical fatigue
UR - http://www.scopus.com/inward/record.url?scp=77957074469&partnerID=8YFLogxK
U2 - 10.1016/S1566-1369(02)80057-7
DO - 10.1016/S1566-1369(02)80057-7
M3 - Article
AN - SCOPUS:77957074469
VL - 29
SP - 3
EP - 13
JO - European Structural Integrity Society
JF - European Structural Integrity Society
SN - 1566-1369
IS - C
ER -