Cyclic plastic deformation mechanism and cyclic hardening model of Sanicro 25 steel welded joint

Li, Haizhou; Chen, Jintao; Chen, Hui; Wang, Hongtao

doi:10.1016/j.msea.2021.141878

Cited by 5 publications

(4 citation statements)

References 38 publications

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“…10,[34][35][36][37][38][39] Figure 10 shows the relative fraction of each ionic unit in the SA1-SA5 slags, and the error range of deconvolution is less than 0.5%. As the Al 2 O 3 content increased, the relative fractions of Q 2 Al (NBO/Al = 2) and Q 3 Al (NBO/ Al = 1) units slightly decreased, whereas that of Q 4 Al (NBO/ Al = 0) unit gradually increased, indicating that the Q 2 Al and Q 3 Al units steadily polymerized into the complex Q 4 Al unit. In addition, the relative fractions of Q 0 Si (NBO/Si = 4), Q 1 Si (NBO/Si = 3) and Q 2 Si (NBO/Si = 2) units slightly decreased, while that of Q 3 Si unit significantly increased with increasing Al 2 O 3 content.…”

Section: Al O Almentioning

confidence: 98%

“…Shucai ZHANG, 1) Huabing LI, 1,2) * Mingze RAN, 1) Zhouhua JIANG, 1) Lichun ZHENG, 1) Hao FENG, 1) Jiangtao YU 1) and Yubo DAI 3) to high tendency of clustering, Al 2 O 3 inclusions can not only cause the clogging of submerged entry nozzles but also deteriorate the properties of the steel. 9) Therefore, it is very necessary to remove Al 2 O 3 inclusions by refining slag as completely as possible.…”

Section: Effect Of Al 2 O 3 On Viscosity and Refining Ability Of High...mentioning

confidence: 99%

“…Over the past several decades, Advanced Ultra-Super-Critical (A-USC) power plants have been developed rapidly to meet the requirements for energy conservation and emission reduction. 1) Since the serving environments in the A-USC power plants are usually high temperatures (above 650°C) and high pressures (as high as 35 MPa), 2,3) there are ever-growing demands for high-performance materials. Due to the excellent high temperature properties, heat-resistant austenitic stainless steels (HRASSs), such as Sanicro 25 and Sanicro 35, are leading candidate materials for superheater and reheater in the A-USC power plants.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Al2O3 on Viscosity and Refining Ability of High Basicity Slag for Heat-resistant Austenitic Stainless Steel

Zhang

Ran

et al. 2022

ISIJ Int.

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Section: Al O Almentioning

confidence: 98%

Section: Effect Of Al 2 O 3 On Viscosity and Refining Ability Of High...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Al2O3 on Viscosity and Refining Ability of High Basicity Slag for Heat-resistant Austenitic Stainless Steel

Zhang

Ran

et al. 2022

ISIJ Int.

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“…11 The creep fracture of Sanicro 25 alloy was a mixed fracture mode of transgranular and intergranular. 7,8,11 Li et al 5,24 found that the precipitation phase at the grain boundary can promote crack initiation, and the increase in strain amplitude can also significantly affect the damage characteristics of the Sanicro 25 alloy under high-temperature strain-controlled fatigue. Pol ak et al 17,[25][26][27][28] conducted detailed investigations for Sanicro 25 alloy under straincontrolled cyclic loading with tensile dwells and concluded the crack initiation and growth mechanisms assisted by high-temperature oxidation.…”

Section: Introductionmentioning

confidence: 99%

Effect of stress amplitude on damage and fracture characteristics of austenitic heat‐resistant steel Sanicro 25 at 973 K

Lyu

Cao

Cheng

et al. 2023

Fatigue Fract Eng Mat Struct

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High‐temperature damage characteristics related to the deformation behavior of Sanicro 25 alloy were investigated under stress‐controlled cyclic loading. The results show that the strain curves exhibited creep‐like strain characteristics. The increase in mean stress increased the strain rate and weakened the life. Comparatively, the increase in stress amplitude only accelerated the tertiary‐regime strain rate, leading to a decrease in life and fracture strain. Microcrack initiation at grain boundaries and primary Z phases at different stress amplitudes can be evidenced by the observation of micro‐voids and high geometrically necessary dislocation densities around them. Subsequently, the increase in stress amplitude can significantly affect crack propagation. Dislocation accumulation at the transgranular crack tip caused by cyclic stress can assist the propagation of the transgranular crack at higher stress amplitude (). Conversely, transgranular cracks are easily suppressed and stop propagating at grain boundaries under constant loading (). The main reason was that the stress concentration of the transgranular crack tip at grain boundaries was dissipated through discontinuous dynamic recrystallization.

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Microstructural Evolution and Mechanical Properties of Reeled X65 Pipeline Steel during Cyclic Plastic Deformation and Natural Aging

Wu,

Ge,

et al. 2024

steel research int.

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The reel laying is recognized as a cost‐effective installation process for offshore pipelines. However, the mechanical properties are modified due to plastic deformation during the reel laying and lowering process of reeled pipelines and the subsequent natural aging in service. Cyclic plastic deformation (CPD) is conducted on X65 pipeline steel to simulate the strain experienced in the reel‐laying and lowering process, and then, the CPD specimen is aged at 250 °C to simulate natural aging in service. The dislocation configurations gradually evolve from dislocation lines and tangles into dislocation walls and cells due to the increase in strain level. After CPD and aging, the tensile strength increases by about 25 MPa, which is not significantly affected by the last introduced load direction and strain level. At the end of compressive loading, the yield strength and yield ratio decrease, but the uniform elongation increases significantly. In contrast, at the end of tensile loading, the yield strength and yield ratio increase, but the uniform elongation decreases slightly. The yield strength further increases as the strain level increases from 2 to 3%. Therefore, CPD and aging modify the mechanical properties of X65, considerably depending on the last introduced load direction and strain level.

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Cyclic plastic deformation mechanism and cyclic hardening model of Sanicro 25 steel welded joint

Cited by 5 publications

References 38 publications

Effect of Al<sub>2</sub>O<sub>3</sub> on Viscosity and Refining Ability of High Basicity Slag for Heat-resistant Austenitic Stainless Steel

Effect of Al<sub>2</sub>O<sub>3</sub> on Viscosity and Refining Ability of High Basicity Slag for Heat-resistant Austenitic Stainless Steel

Effect of stress amplitude on damage and fracture characteristics of austenitic heat‐resistant steel Sanicro 25 at 973 K

Microstructural Evolution and Mechanical Properties of Reeled X65 Pipeline Steel during Cyclic Plastic Deformation and Natural Aging

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