Creep Rupture Assessment of New Heat-Resistant Sanicro 25 Steel Using Different Life Prediction Approaches

Zhao, Lei; Song, Kai; Zhang, Yu; Meng, Sheng; Xu, Lianyong; Han, Yongdian; Jing, Hongyang

doi:10.1007/s11665-019-04478-1

Cited by 5 publications

(3 citation statements)

References 33 publications

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“…The strain dependence of the cavitated area fraction will be illustrated for Sanicro 25 for the case of 240 MPa in Figure 6. The data for Sanicro 25 are taken from [58], where the same tests as in [24] are used. The grain size d g is 20 µm, and the distance between particles in the grain boundaries λ part is 4 µm.…”

Section: Tertiary Creep With the Omega Modelmentioning

confidence: 99%

Basic Analytical Modeling of Creep Strain Curves

Sandström

2023

Materials

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Creep strain versus time curves (creep curves) have traditionally been described with the help of empirical models where a number of adjustable parameters are involved. These models are simple to use, but they cannot be applied for prediction. For understanding the general behavior of primary and tertiary creep, they are still useful. In fact, the phi model can represent primary creep, and the Omega model tertiary creep for a number of materials. However, in recent years, basic analytical models have been formulated that can predict and describe creep strain data without using fitting parameters. In the paper, a review of these models is given. A number of applications of the models are also given. It is demonstrated that the basic models can quantitatively predict observations. They also provide derivations of some empirical findings.

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Section: Tertiary Creep With the Omega Modelmentioning

confidence: 99%

Basic Analytical Modeling of Creep Strain Curves

Sandström

2023

Materials

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“…From the newly developed austenitic steels, the highest interest was devoted to advanced austenitic stainless steels such as NF709, H3RC and Sanicro 25. Originally, the creep resistance was investigated 2,29–32 . The basic study of the low cycle fatigue with constant strain rate at constant ambient and high temperature of Sanicro 25 (isothermal fatigue [IF]) 33 and the study of its cyclic stress–strain response using statistical theory of the hysteresis loop 34 started a number of more thorough studies of this material.…”

Section: Introductionmentioning

confidence: 99%

“…Originally, the creep resistance was investigated. 2,[29][30][31][32] The basic study of the low cycle fatigue with constant strain rate at constant ambient and high temperature of Sanicro 25 (isothermal fatigue [IF]) 33 and the study of its cyclic stress-strain response using statistical theory of the hysteresis loop 34 started a number of more thorough studies of this material. Transmission electron microscopy (TEM) was used to study the dislocation arrangement, 35 the sources of its extraordinary cyclic hardening 36 and the damage mechanisms at room and at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

The effect of dwell on thermomechanical fatigue in superaustenitic steel Sanicro 25

Petráš

Šulák

Polák

2020

Fatigue Fract Eng Mat Struct

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Superaustenitic steel Sanicro 25 has been subjected to out‐of‐phase thermomechanical fatigue cycles with 10‐min dwell at peak temperature in the temperature range from 250°C to 700°C. The effect of the dwells on the cyclic response, internal structure and damage mechanism was studied. Cyclic hardening/softening curves, cyclic stress–strain curves and fatigue life curves were evaluated. The internal structure and nanoparticles representing the obstacles for dislocation motion were analysed and identified by energy dispersive X‐ray spectroscopy in scanning transmission electron microscope. Scanning electron microscopy combined with focused ion beam and electron backscatter diffraction was adopted to reveal the respective mechanisms responsible for fatigue crack nucleation and propagation. Effect of dwells in in‐phase and in out‐of‐phase cycling on the fatigue behaviour, on the modification of internal structure and damage mechanisms, were analysed and discussed.

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