Research on representative stress and fracture ductility of P92 steel under multiaxial creep
Source abstract
Abstract
Abstract Creep experiments on both plain and notched specimens were conducted at 650 °C over a stress range of 120–185 MPa. The notch strengthening effect was found to exhibit in notched specimens. By using stress components at the skeletal point, several expressions of representative stress were compared to validate their effectiveness in predicting creep rupture lives of P92 steel under multiaxial stress states. The results showed that Hayhurst representative stress was more suitable for life predictions of P92 steel. In the mean time, the relationship between the fracture ductility and multiaxiality was presented to investigate the influence of the multiaxial stress states on creep rupture behavior of P92 steel. A more reasonable prediction model was proposed, and the validity of the model was verified by experimental data.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Temperature Alloys and Creep · Fatigue and fracture mechanics · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Creep damage assessment for notched bar specimens of a low alloy steel considering stress multiaxiality
2. Failure in notched tension bars due to high-temperature creep: interaction between nucleation controlled cavity growth and continuum cavity growth10.1016/j.ijsolstr.2007.11.026 ↗
3. On creep failure of notched bars10.1016/j.engfailanal.2007.06.011 ↗
4. Uni-axial and multi-axial creep behaviour of P91-type steel under constant load10.1016/j.engfailanal.2010.08.005 ↗
5. Finite element analysis of uniaxial and multiaxial state of stress on creep rupture behaviour of 2.25Cr-1Mo steel10.1016/j.msea.2012.11.038 ↗
6. Micro- and macro-creep damage formation for P92 under multiaxial stress related to circular notched specimen10.1179/1743284713Y.0000000310 ↗
7. Creep rupture under multi-axial states of stress10.1016/0022-5096(72)90015-4 ↗
8. Long-term strength of EI437B alloy in complex stress state
9. Cane BJ. Creep damage accumulation and fracture under multi-axial stresses. Proc of 5th Int Conf on Fract. (ICF5), Pergamon Press, Oxford, pp. 1285–1293.
10. An improved multiaxial creep-rupture strength criterion10.1115/1.3264476 ↗
11. Assessment of an improved multiaxial strength theory based on creep-rupture data for type 316 stainless steel10.1115/1.2929513 ↗
12. On the ductile enlargement of voids in triaxial stress fields10.1016/0022-5096(69)90033-7 ↗
13. Application of bound theorems for creeping solids and their application to large strain diffusional flow10.1016/0001-6160(78)90153-0 ↗
14. Intergranular fracture during power-law creep10.1016/0001-6160(79)90173-1 ↗
15. Intergranular fracture during power-law creep under multiaxial stresses10.1179/030634580790441187 ↗
16. On creep fracture by void growth10.1016/0079-6425(82)90001-9 ↗
17. Creep-rupture behavior of weldments
18. GB/T 2039-1997
19. A code of practice for conducting notched bar creep tests for interpreting the data10.1111/j.1460-2695.2004.00765.x ↗
20. Skeletal point stresses in circumferentially notched tension bars undergoing tertiary creep modelled with physically based constitutive equations10.1098/rspa.1993.0065 ↗
21. Prediction of creep failure in aeroengine materials under multi-axial stress states10.1016/0020-7403(95)00063-1 ↗
22. Finite element analysis of notched bar skeletal point stresses and dimension changes due to creep10.1111/j.1460-2695.2004.00704.x ↗
23. The effect of multiaxial stress state on creep behavior and fracture mechanism of P92 steel10.1016/j.msea.2015.03.056 ↗
24. Multiaxial stress rupture behaviour and stress-state sensitivity of creep damage distribution in durehete 1055 and 2.25Cr1Mo steel10.1016/j.ijpvp.2003.12.023 ↗
25. Initiation and growth behavior of creep voids in an austenitic steel with high ductility under multi-axial stresses10.2355/isijinternational.43.251 ↗