Thermo-mechanical fatigue behavior of cast 319 aluminum alloys

C. C. Engler-Pinto; Huseyin Sehitoglu; H. J. Maier; T. J. Foglesong

doi:10.1016/S1566-1369(02)80057-7

Thermo-mechanical fatigue behavior of cast 319 aluminum alloys

C. C. Engler-Pinto, Huseyin Sehitoglu, H. J. Maier, T. J. Foglesong

Mechanical Science and Engineering

Research output: Contribution to journal › Article

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.

Original language	English (US)
Pages (from-to)	3-13
Number of pages	11
Journal	European Structural Integrity Society
Volume	29
Issue number	C
DOIs	https://doi.org/10.1016/S1566-1369(02)80057-7
State	Published - Dec 1 2002

Keywords

Thermo-mechanical fatigue
cast aluminum
fracture mechanism
microstructural coarsening
stress-strain response

ASJC Scopus subject areas

Civil and Structural Engineering
Mechanics of Materials

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Engler-Pinto, C. C., Sehitoglu, H., Maier, H. J., & Foglesong, T. J. (2002). Thermo-mechanical fatigue behavior of cast 319 aluminum alloys. European Structural Integrity Society, 29(C), 3-13. https://doi.org/10.1016/S1566-1369(02)80057-7

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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.",

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AU - Engler-Pinto, C. C.

AU - Sehitoglu, Huseyin

AU - Maier, H. J.

AU - Foglesong, T. J.

PY - 2002/12/1

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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 - Thermo-mechanical fatigue

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