Product Information
- Author
- Herausgeber FKM
- EAN
- 4250697510405
- Edition
- 2002
- Delivery time
- next business day
Verhalten warmfester Stähle bei regelloser Zeitstandbeanspruchung
139.10 EUR *
Gesamtpreis: 139.10 EUR *
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Description
Verhalten warmfester Stähle bei regelloser Zeitstandbeanspruchung
FKM 2002
Issue No. 269
Project No. 225
Abstract:
The project dealt with the material behavior of creep rupture strength steels for thermal machine and plant construction. A service life counter program LARA S was developed, which deals with random creep rupture stress with occasional occurring overelastic stresses. The generalized damage accumulation hypothesis was used to describe the material behaviour under random creep loading. It can be used to determine computational creep damage fractions based on the modified fatigue life fraction rule and computational fatigue damage fractions using the Miner rule. Single and multi-stage partial stress cycles without and with compression phases could be derived from the analysis of service records. The creep rupture behavior of the steels X10CrMoVNb9-1 and X3CrNiMoN17-13 under single-stage loading was described using the factor concept. For these two steels and also for the steels X12CrNiMoWVNbN10-1-1 and G17CrMoV5-11, the description of the material behavior under multi-stage loading was experimentally verified using the step hypothesis. Furthermore, the influence of limited and pronounced compression phases was investigated. In order to verify the service life predicted with LARA S, non-steady-state creep tests were carried out on the steels 28CrMoNiV4-9, X21CrMoV12-1 and X12CrNiMoWVNbN10-1-1 with modified temperature and stress up to approx. 5000 hours. For this purpose, the stress curves derived from service recordings were increased with regard to stress and temperature-time curves. The applicability of LARA S with the specified concepts can be recognized from the comparison of prediction and experiment.
Scope of report:
97 p., 65 Fig., 12 Tab., 87 Lit Start of work:
01.01.1998 End of work:
30.06.2001 Funding body:
AVIF No. A123 Research unit:
Institute of Materials Science Technical University Darmstadt Author:
Prof. Dr.-lng. C. Berger Dr.-lng. J. Granacher Dr.-lng. A. Scholz Dipl.-lng. H. Möhlig Chairman of the working group:
Dipl.-lng. M. Reigl, Alstom Power, Baden, Switzerland Chairman of the advisory board:
Dipl.-lng. J. Rabe, Höchstadt
Issue No. 269
Project No. 225
Abstract:
The project dealt with the material behavior of creep rupture strength steels for thermal machine and plant construction. A service life counter program LARA S was developed, which deals with random creep rupture stress with occasional occurring overelastic stresses. The generalized damage accumulation hypothesis was used to describe the material behaviour under random creep loading. It can be used to determine computational creep damage fractions based on the modified fatigue life fraction rule and computational fatigue damage fractions using the Miner rule. Single and multi-stage partial stress cycles without and with compression phases could be derived from the analysis of service records. The creep rupture behavior of the steels X10CrMoVNb9-1 and X3CrNiMoN17-13 under single-stage loading was described using the factor concept. For these two steels and also for the steels X12CrNiMoWVNbN10-1-1 and G17CrMoV5-11, the description of the material behavior under multi-stage loading was experimentally verified using the step hypothesis. Furthermore, the influence of limited and pronounced compression phases was investigated. In order to verify the service life predicted with LARA S, non-steady-state creep tests were carried out on the steels 28CrMoNiV4-9, X21CrMoV12-1 and X12CrNiMoWVNbN10-1-1 with modified temperature and stress up to approx. 5000 hours. For this purpose, the stress curves derived from service recordings were increased with regard to stress and temperature-time curves. The applicability of LARA S with the specified concepts can be recognized from the comparison of prediction and experiment.
Scope of report:
97 p., 65 Fig., 12 Tab., 87 Lit Start of work:
01.01.1998 End of work:
30.06.2001 Funding body:
AVIF No. A123 Research unit:
Institute of Materials Science Technical University Darmstadt Author:
Prof. Dr.-lng. C. Berger Dr.-lng. J. Granacher Dr.-lng. A. Scholz Dipl.-lng. H. Möhlig Chairman of the working group:
Dipl.-lng. M. Reigl, Alstom Power, Baden, Switzerland Chairman of the advisory board:
Dipl.-lng. J. Rabe, Höchstadt
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