Low cycle fatigue behavior and microstructure evolution of a novel 9Cr–3W–3Co tempered martensitic steel at 650 °C

Jing, Hongyang; Luo, Zhenxuan; Xu, Longhua; Zhao, Lei

doi:10.1016/j.msea.2018.06.071

Cited by 54 publications

(38 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition to the dislocation tangles, some dislocation lines and interactions between dislocations and precipitates with different sizes are presented in Figure B. It is known that the G115 steel contains several kinds of precipitate, such as MX, M 23 C 6 , Cu‐rich, and Laves phase, after heat treatment or high‐temperature testing . Figure C,D shows the precipitates mainly along various boundaries and the corresponding SAED and EDS analysis for the as‐received G115 steel.…”

Section: Resultsmentioning

confidence: 99%

“…It has been reported that precipitation hardening is the dominant creep‐strengthening mechanism for G115 steel . Generally, precipitates can pin the dislocation lines, restrain the dislocation movement, and help store dislocations . According to the analysis in Figures , the Nb‐rich MX phase, Cu‐rich precipitate, Cr‐rich M 23 C 6 phase, and W‐rich Laves phase all have interactions with dislocations.…”

Section: Resultsmentioning

confidence: 99%

“…It is known that the G115 steel contains several kinds of precipitate, such as MX, M 23 C 6 , Cu-rich, and Laves phase, after heat treatment or high-temperature testing. 5,[13][14][15][16]32,44 Figure 11C, D shows the precipitates mainly along various boundaries and the corresponding SAED and EDS analysis for the asreceived G115 steel. It was confirmed that they were Crrich M 23 C 6 carbides (Cr 23 C 6 ) with an ellipsoidal or rod shape and a size of approximately 100 to 300 nm.…”

Section: Comparisons Of the Dislocation Structures And Precipitatesmentioning

confidence: 99%

“…15 Generally, precipitates can pin the dislocation lines, restrain the dislocation movement, and help store dislocations. 44 According to the analysis in Figures 11-13, the Nb-rich MX phase, Cu-rich precipitate, Cr-rich M 23 C 6 phase, and W-rich Laves phase all have interactions with dislocations. Under a creep-fatigue condition, these precipitates may suffer complex evolutions, and the coarsening of them is inevitable.…”

Section: Comparisons Of the Dislocation Structures And Precipitatesmentioning

confidence: 99%

See 3 more Smart Citations

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

Tang

Jing

Zhao

et al. 2019

Fatigue Fract Eng Mat Struct

Self Cite

View full text Add to dashboard Cite

Many components operate under creep‐fatigue loading causing an increasing need to learn the knowledge about creep‐fatigue crack growth (CFCG). The stress and microstructural evolution around the crack tip of G115 steel after CFCG were investigated. According to the finite element simulations, the variations of equivalent stress and stress triaxiality in the crack tip zone are presented. Furthermore, the evolutions of martensitic laths, dislocations, and precipitates were systematically studied through electron backscatter diffraction and transmission electron microscopy observations. The laths at the crack tip or under a larger hold time are wider than those remote from the crack tip or under a shorter dwell time. Meanwhile, the dislocation densities reduced significantly at the crack tip or under a larger hold time. The different variations of laths' width and dislocation densities resulted from the different stress triaxiality and creep strain. W‐rich Laves and Cu‐rich phases appeared during CFCG. The Laves phase coarsened rapidly because of the stress‐accelerated diffusion.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Comparisons Of the Dislocation Structures And Precipitatesmentioning

confidence: 99%

Section: Comparisons Of the Dislocation Structures And Precipitatesmentioning

confidence: 99%

See 2 more Smart Citations

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

Tang

Jing

Zhao

et al. 2019

Fatigue Fract Eng Mat Struct

Self Cite

View full text Add to dashboard Cite

show abstract

“…Consequently, proper life prediction of LCF and CFI loadings is of great significance to the design of components in order to minimize the risk of unplanned standstills in plants. However, macroscopically, it has been demonstrated that LCF and CFI lifetime are not only related to the type of material, but are also affected by the interactive effects of temperature, strain amplitude, hold conditions and environmental corrosion [3][4][5]. Regarding Eurofer 97 steel tested in high vacuum, there is no significant effect of test temperature ranging from 150 • C to 550 • C on fatigue life at the same strain amplitude.…”

Section: Introductionmentioning

confidence: 99%

A New Empirical Life Prediction Model for 9–12%Cr Steels under Low Cycle Fatigue and Creep Fatigue Interaction Loadings

Wang

Zhang

et al. 2019

Metals

View full text Add to dashboard Cite

Low cycle fatigue (LCF) and creep fatigue interaction (CFI) loadings are the main factors resulting in the failure of many critical components in the infrastructure of power plants and aeronautics. Accurate prediction of life spans under specified loading conditions is significant for the design and maintenance of components. In the present study, various LCF and CFI tests are conducted to investigate the effects of temperature, strain amplitude, hold time and hold direction on the fatigue life of P92 steel. To predict fatigue life under different experimental conditions, various conventional life prediction models are evaluated and discussed. Moreover, a new empirical life prediction model is proposed based on the conventional Manson-Coffin-Basquin (MCB) model. The newly proposed model is able to simultaneously consider the effects of temperature, strain amplitude, hold time and hold direction on predicted life. The main advantage is that only the known input experimental parameters are required to perform the prediction. In addition to the validation made through the experimental data of P92 steel conducted in the present paper, the model is also verified through numerous experimental data reported in the literature for various 9–12% Cr steels.

show abstract

Advanced Materials for Mechanical Engineering: Ultrafine‐Grained Alloys with Multilayer Coatings

et al. 2021

View full text Add to dashboard Cite

Research has demonstrated that the formation of a bulk ultrafine‐grained (UFG) structure in metals and alloys through severe plastic deformation (SPD) enables increasing of their strength properties and decreasing of the temperature range of superplasticity. Designers and process engineers generally show a great interest in such materials because the development of mechanical engineering industries places ever‐increasing demands on the performance properties of commercial alloys, especially for parts operating under extreme conditions. One of the approaches for a comprehensive enhancement of the performance characteristics of structural materials is a combination of a UFG structure in the bulk of a material, providing an increase in strength, and an additional surface modification providing resistance to erosion and corrosion damage. As a result, a set of material service properties can be enhanced, which is difficult to achieve through only metal nanostructuring or only surface modification. This approach has been demonstrated through an example of UFG titanium alloys produced by SPD, including those with nanostructured multilayer TiVN coatings of different “architectures.” Accordingly, herein, the trends, problems, and prospects of surface modification for the innovative application of structural UFG titanium alloys in advanced mechanical engineering are examined.

show abstract

Low cycle fatigue behavior and microstructure evolution of a novel 9Cr–3W–3Co tempered martensitic steel at 650 °C

Cited by 54 publications

References 46 publications

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

A New Empirical Life Prediction Model for 9–12%Cr Steels under Low Cycle Fatigue and Creep Fatigue Interaction Loadings

Advanced Materials for Mechanical Engineering: Ultrafine‐Grained Alloys with Multilayer Coatings

Contact Info

Product

Resources

About

Low cycle fatigue behavior and microstructure evolution of a novel 9Cr–3W–3Co tempered martensitic steel at 650 °C

Cited by 54 publications

References 46 publications

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

A New Empirical Life Prediction Model for 9–12%Cr Steels under Low Cycle Fatigue and Creep Fatigue Interaction Loadings

Advanced Materials for Mechanical Engineering: Ultrafine‐Grained Alloys with Multilayer Coatings

Contact Info

Product

Resources

About

Low cycle fatigue behavior and microstructure evolution of a novel 9Cr–3W–3Co tempered martensitic steel at 650 °C