Effect of dynamic strain ageing on environmental degradation of fracture resistance of low-alloy RPV steels in high-temperature water environments

Que, Zaiqing; Seifert, Hans-Peter; Spätig, P.; Zhang, A.; Holzer, Jakub; Rao, G. Sudhakar; Ritter, Stefan

doi:10.1016/j.corsci.2019.03.013

Cited by 12 publications

(2 citation statements)

References 28 publications

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“…Mild steel materials are widely employed in many building structures, engineering machinery and infrastructure. Presently, mechanical property tests are common and mature methods to evaluate the effects of strain aging on steel materials, including the Charpy impact test, Vickers hardness test, tensile test and fracture toughness test (Chemingui et al, 2010; Que et al, 2019; Ule et al, 1996; Wu et al, 2017; Zhao et al, 2012). The above conventional tests have limitations in evaluating an in-service structure affected by strain aging because sampling is required for these destructive tests.…”

Section: Introductionmentioning

confidence: 99%

“…The results indicated that the ductility of the material decreased significantly owing to the strain aging effect, such that the additional displacement and bearing capacity (P) of the steel beam correspondingly decreased. Recently, the effect of strain aging on steel materials has been considered in various fields, such as pipeline steel (Wu et al, 2017), reactor pressure vessel steel (Que et al, 2019), reinforcing rebars (Loporcaro et al, 2019) and steel panels for automotive applications (Yuan et al, 2018). However, the effect of static strain aging on partially damaged steel in building structures has not been investigated extensively.…”

Section: Introductionmentioning

confidence: 99%

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Feasibility of studying 460 MPa high-strength steel affected by strain aging with acoustic emission method

Yang

Wang

2020

Advances in Structural Engineering

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Strain aging significantly influences the behavior of partially damaged structural steel. The effects of strain aging can be determined based on mechanical experiments, but the sampling process causes further damage to the structures. To explore the possibility of using nondestructive testing (NDT) technology to distinguish the strain aging effects on steel materials, this study investigates the characteristics of acoustic emission (AE) signals for high-strength steel (HSS) affected by strain aging. First, different strain aging effects were applied to 460 MPa HSS specimens. Second, pencil lead break (PLB) tests were performed on the specimens with strain aging, and the generated AE signals were recorded. Finally, tensile tests were conducted, that the strain aging effects on mechanical behavior were determined. The obtained AE signals were compared by extracting the AE parameters and analyzed in the frequency and time-frequency domains with a fast Fourier transform (FFT) and a wavelet transform (WT), respectively. The study shows that the strain aging effects change the characteristics of the AE signals. Compared to the prestrain, the aging time has a more pronounced impact on the AE behaviors. This research proposes a possible NDT method to determine the effects of strain aging on steel materials. Experimental data are provided to detect the degree of partial damage to 460 MPa HSS owing to strain aging using the AE method.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Feasibility of studying 460 MPa high-strength steel affected by strain aging with acoustic emission method

Yang

Wang

2020

Advances in Structural Engineering

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Effect of environmental media on the fatigue property of Chinese A508-3 steel of AP1000

Ning

Zhong

et al. 2021

Int J Fract

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Stress-state dependence of dynamic strain aging: Thermal hardening and blue brittleness

Liu

Lian

2021

Int J Miner Metall Mater

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This study aims to discover the stress-state dependence of the dynamic strain aging (DSA) effect on the deformation and fracture behavior of high-strength dual-phase (DP) steel at different deformation temperatures (25–400°C) and reveal the damage mechanisms under these various configurations. To achieve different stress states, predesigned specimens with different geometric features were used. Scanning electron microscopy was applied to analyze the fracture modes (e.g., dimple or shear mode) and underlying damage mechanism of the investigated material. DSA is present in this DP steel, showing the Portevin-Le Chatelier (PLC) effect with serrated flow behavior, thermal hardening, and blue brittleness phenomena. Results show that the stress state contributes distinctly to the DSA effect in terms of the magnitude of thermal hardening and the pattern of blue brittleness. Either low stress triaxiality or Lode angle parameter promotes DSA-induced blue brittleness. Accordingly, the damage mechanisms also show dependence on the stress states in conjunction with the DSA effect.

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Effect of dynamic strain ageing on environmental degradation of fracture resistance of low-alloy RPV steels in high-temperature water environments

Cited by 12 publications

References 28 publications

Feasibility of studying 460 MPa high-strength steel affected by strain aging with acoustic emission method

Feasibility of studying 460 MPa high-strength steel affected by strain aging with acoustic emission method

Effect of environmental media on the fatigue property of Chinese A508-3 steel of AP1000

Stress-state dependence of dynamic strain aging: Thermal hardening and blue brittleness

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