Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | ASTM Special Technical Publication |
| Herausgeber (Verlag) | ASTM International |
| Seiten | 18-35 |
| Seitenumfang | 18 |
| Auflage | 1371 |
| ISBN (Print) | 0803128533 |
| Publikationsstatus | Veröffentlicht - 2000 |
| Extern publiziert | Ja |
| Veranstaltung | The Symposium of 'Thermo-Mechanical Fatigue Behavior of Materials: Third Volume' - Norfolk, VA, USA Dauer: 4 Nov. 1998 → 5 Nov. 1998 |
Publikationsreihe
| Name | ASTM Special Technical Publication |
|---|---|
| Nummer | 1371 |
| ISSN (Print) | 1040-3094 |
Abstract
The high-temperature titanium alloy IMI 834 was studied with regard to the stress-strain response under thermo-mechanical fatigue conditions, the evolution of the microstructure, the relevant damage mechanisms and their implications for fatigue life. For this purpose isothermal and thermo-mechanical fatigue tests were performed in the temperature range from 350°C to 650°C in vacuum and air, respectively, and changes in the microstructure were determined by means of transmission electron microscopy. It was found that planar dislocation slip prevails in all tests in which the temperature does not exceed 600°C. Hence, in this temperature range the stress-strain response under thermo-mechanical conditions can be predicted solely based on the isothermal behavior. By contrast, a transition to wavy slip takes place at higher temperatures, affecting significantly the stresses in the low-temperature part of the corresponding thermo-mechanical fatigue tests. Fatigue life was generally observed to be lower in out-of-phase tests as compared to in-phase loading. Furthermore, the tests performed in high vacuum demonstrated that oxidation strongly affects fatigue life, but does not basically change the influence of testing mode on cyclic life. This can mainly be attributed to the additional effect of the acting mean stress.
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ASTM Special Technical Publication. 1371. Aufl. ASTM International, 2000. S. 18-35 (ASTM Special Technical Publication; Nr. 1371).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Behavior of the high-temperature titanium alloy IMI 834 under thermo-mechanical and isothermal fatigue conditions
AU - Pototzky, Peter
AU - Maier, Hans Jürgen
AU - Christ, Hans Jürgen
PY - 2000
Y1 - 2000
N2 - The high-temperature titanium alloy IMI 834 was studied with regard to the stress-strain response under thermo-mechanical fatigue conditions, the evolution of the microstructure, the relevant damage mechanisms and their implications for fatigue life. For this purpose isothermal and thermo-mechanical fatigue tests were performed in the temperature range from 350°C to 650°C in vacuum and air, respectively, and changes in the microstructure were determined by means of transmission electron microscopy. It was found that planar dislocation slip prevails in all tests in which the temperature does not exceed 600°C. Hence, in this temperature range the stress-strain response under thermo-mechanical conditions can be predicted solely based on the isothermal behavior. By contrast, a transition to wavy slip takes place at higher temperatures, affecting significantly the stresses in the low-temperature part of the corresponding thermo-mechanical fatigue tests. Fatigue life was generally observed to be lower in out-of-phase tests as compared to in-phase loading. Furthermore, the tests performed in high vacuum demonstrated that oxidation strongly affects fatigue life, but does not basically change the influence of testing mode on cyclic life. This can mainly be attributed to the additional effect of the acting mean stress.
AB - The high-temperature titanium alloy IMI 834 was studied with regard to the stress-strain response under thermo-mechanical fatigue conditions, the evolution of the microstructure, the relevant damage mechanisms and their implications for fatigue life. For this purpose isothermal and thermo-mechanical fatigue tests were performed in the temperature range from 350°C to 650°C in vacuum and air, respectively, and changes in the microstructure were determined by means of transmission electron microscopy. It was found that planar dislocation slip prevails in all tests in which the temperature does not exceed 600°C. Hence, in this temperature range the stress-strain response under thermo-mechanical conditions can be predicted solely based on the isothermal behavior. By contrast, a transition to wavy slip takes place at higher temperatures, affecting significantly the stresses in the low-temperature part of the corresponding thermo-mechanical fatigue tests. Fatigue life was generally observed to be lower in out-of-phase tests as compared to in-phase loading. Furthermore, the tests performed in high vacuum demonstrated that oxidation strongly affects fatigue life, but does not basically change the influence of testing mode on cyclic life. This can mainly be attributed to the additional effect of the acting mean stress.
UR - http://www.scopus.com/inward/record.url?scp=0033892420&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0033892420
SN - 0803128533
T3 - ASTM Special Technical Publication
SP - 18
EP - 35
BT - ASTM Special Technical Publication
PB - ASTM International
T2 - The Symposium of 'Thermo-Mechanical Fatigue Behavior of Materials: Third Volume'
Y2 - 4 November 1998 through 5 November 1998
ER -