Evaluation of creep–fatigue life based on fracture energy for modified 9Cr–1Mo steel

Nagae, Yuji

doi:10.1016/j.msea.2012.10.029

Cited by 14 publications

(7 citation statements)

References 21 publications

(20 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies [4][5][6][7] showed that ferritic steels are sensitive to softening during LCF and creep-fatigue loadings at high temperature. The softening behavior of 9-12%Cr steels is due to the complex microstructure evolutions: [4,6,[8][9][10] transformation of lath structure to dislocation cell/ subgrain structure, increasing of subgrain size, coarsening of precipitates, decreasing in average free dislocation density and dislocation recovery process occurring during strain cycling. At high temperature, the creep performance, fracture mechanisms and tensile deformation behavior of P92 steel have been well understood.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Low Cycle Fatigue Performance of New Ferritic P92 Steel at High Temperature: Effect of Strain Amplitude

Wang

Gong

Zhao

et al. 2015

steel research int.

View full text Add to dashboard Cite

Low cycle fatigue (LCF) tests were performed at various strain amplitudes ranging from 0.2 to 0.8% to investigate the effects of strain amplitude on cyclic softening behavior and LCF lifetime of new ferrtic P92 steel. LCF tests were conducted under strain controlled in fully reversed manner with strain rate of 1.0 Â 10 À3 s À1 at high temperature of 650 8C. A novel fatigue life end criterion was adopted in this analysis. The effects of strain amplitude on the cyclic softening behavior, the evolution of plastic strain amplitude, hysteresis loop area and the fatigue life were discussed. Similar softening curves were achieved except for the strain amplitude of 0.2%. The evolution of hysteresis loop areas at the smaller strain range amplitude (less than 0.4%) is contrary to the larger ones. A modified life prediction model was proposed based on Coffin-Manson model and energy-based model, comparison of predicted lifetime and experimental data shows that the model gives a good estimation. In order to better understand the basic stress-strain behavior, time-independent cyclic plasticity model was used to represent the cyclic mechanical behavior of this steel. Comparison of the simulated and experimental results shows that the proposed model can give a reasonable prediction of stress-strain hysteresis loop for P92 steel at high temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterization of Low Cycle Fatigue Performance of New Ferritic P92 Steel at High Temperature: Effect of Strain Amplitude

Wang

Gong

Zhao

et al. 2015

steel research int.

View full text Add to dashboard Cite

show abstract

“…Besides, the time per cycle becomes longer by introducing a hold period into the cycle. If the HEDR concept 35 is introduced and is defined as the ratio of the HED to cyclic time per cycle, the larger HEDR corresponds to a shorter failure time that is consistent with the energy‐based theory. Hence, the HEDR is a promising damage parameter in combining both HTLCF and creep‐fatigue life.…”

Section: Proposed Hedr‐based Modelmentioning

confidence: 81%

“…In order to account for the frequency and hold time effects, Ostergren 3 proposed a tensile hysteresis energy‐based method in which a frequency factor is introduced to account for the loading waveform effect. In addition to Ostergren damage model, many other energy‐based models are also established, which can also account for the loading waveform effect, such as the inelastic strain energy density exhaustion criteria, 27–30 strain energy‐partition methods, 31,32 frequency modified energy criteria 33 and the HEDR model 34,35 . However, though the methods reviewed above can give good prediction performance, some limitations are also existed.…”

Section: Review Of Energy‐based Fatigue Life Prediction Modelsmentioning

confidence: 99%

An efficient fatigue and creep‐fatigue life prediction method by using the hysteresis energy density rate concept

Wang

2020

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Fatigue damage, time-dependent creep damage and their interaction are considered as the main failure mechanisms for many high temperature structural components. A generalized methodology for predicting both the high temperature low cycle fatigue (HTLCF) and creep-fatigue lives by using the hysteresis energy density rate (HEDR) and fatigue damage stress concepts was proposed.Experimental data for HTLCF and creep-fatigue in Alloy 617, Haynes 230 and

show abstract

“…The evaluation of fatigue behavior at elevated temperatures has concerned within a number of frameworks, inclusive of but not limited to continuum damage mechanics, fracture mechanics, phenomenological methods, energy criteria, and experience based empirical models. Presently, special attention is being paid to energy criteria according to their superiority of robustness in life prediction [6][7][8] . For today, it is possible to state the presence of numerous investigations on LCF-C life prediction models as evidenced by the reviews and some comparative analyses given in Refs.…”

Section: Introductionmentioning

confidence: 99%

A New Ductility Criterion for Fatigue-Creep Life Prediction of High Temperature Components

Huang

Liu

Meng³

et al. 2014

55th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

View full text Add to dashboard Cite

Ductility exhausted during fatigue-creep interaction loading is focused on predicting fatigue-creep life for high temperature components. Based on the exhaustion of static toughness and dissipation of total strain energy during fatigue failure, a new ductility criterion for fatigue-creep life prediction is presented in an attempt to develop ductility based life prediction approaches for general use in isothermal and thermo-mechanical fatigue loading. In this criterion, the fatigue toughness to failure of materials was established and the development of fatigue toughness to fatigue-creep failure analysis is presented. The accuracy of the proposed criterion was verified by comparison between model approximation and experimental results of 1.25Cr0.5Mo steel and GH4133 superalloy under different loading conditions. The comparison shows promising agreement, thus validating the capability of the proposed criterion to produce accurate fatigue-creep life prediction. Nomenclature ,, AC = material-specific constants E = Young's modulus p E = viscosity-based parameter n = cyclic strain hardening exponent f N = number of cycles to failure f W = energy required to facilitate fatigue failure t W  = total strain energy density lim W  = elastic strain energy density at the fatigue limit of the material p W  = plastic strain energy density e W   = tensile elastic strain energy density m T = fatigue toughness  = strain rate d  = dynamic viscosity t   = total strain range AIAA SciTech 2 e   , p   = elastic strain range and plastic strain range max  , min  = maximum and minimum stress sat   = saturated stress range   = stress range

show abstract

Evaluation of creep–fatigue life based on fracture energy for modified 9Cr–1Mo steel

Cited by 14 publications

References 21 publications

Characterization of Low Cycle Fatigue Performance of New Ferritic P92 Steel at High Temperature: Effect of Strain Amplitude

Characterization of Low Cycle Fatigue Performance of New Ferritic P92 Steel at High Temperature: Effect of Strain Amplitude

An efficient fatigue and creep‐fatigue life prediction method by using the hysteresis energy density rate concept

A New Ductility Criterion for Fatigue-Creep Life Prediction of High Temperature Components

Contact Info

Product

Resources

About