Characteristic of Interface Crack Propagation in Dissimilar Weld Joints

Wang, Wei Bing; Xue, He; Yang, Fuqiang; Zhou, Xu

doi:10.4028/www.scientific.net/amr.988.249

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…e schematic diagram of the 0.5T-CT specimen in the SA508 Cl.3-Alloy 52M DMWJ is shown in Figure 2, and the length of the prefabricated crack is 2 mm. During the welding progress, the uneven distribution of the microstructure at the interface zones makes the mechanical properties complicated and unevenly distributed [22,23].…”

Section: Specimen and Materials Model Compact Tension (Ct)mentioning

confidence: 99%

A Numerical Approach to Analyze Detail Mechanical Characteristic at the Crack Tip of SCC in Dissimilar Metal Welded Joints

Xue

Sun

Zhang

et al. 2021

Advances in Materials Science and Engineering

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The mechanical characteristic at the crack tip is one of the main factors affecting the stress corrosion cracking (SCC) in dissimilar metal welded joints (DMWJs). In this research, to evaluate the effect of heterogeneous material properties on the mechanical characteristic at the crack tip of DMWJs accurately, a heterogeneous material model of the SA508 Cl.3-Alloy 52M DMWJ was established based on USDFLD subroutine in ABAQUS. The comparison of the traditional “Sandwich” material model with the heterogeneous material properties, stress-strain conditions, and the plastic zone around the crack tip at the interference zone has been analyzed by the finite element method (FEM). The results indicated that the heterogeneous material model could characterize the mechanical properties of the SA508 Cl.3-Alloy 52M DMWJs accurately. In addition, the crack at the interface zone between materials will deflect along with the weld metal in two material models.

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Section: Specimen and Materials Model Compact Tension (Ct)mentioning

confidence: 99%

A Numerical Approach to Analyze Detail Mechanical Characteristic at the Crack Tip of SCC in Dissimilar Metal Welded Joints

Xue

Sun

Zhang

et al. 2021

Advances in Materials Science and Engineering

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“…Even the mismatch of weldments has been much discussed, most of them focus on the effects of yield strength mismatch [15][16][17][18][19], and little concerns the ultimate tensile strength and elastic modulus differences of the welded metals.…”

Section: Introductionmentioning

confidence: 99%

Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints

Yang

Xue

Zhao

et al. 2019

Advances in Materials Science and Engineering

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The stress and strain status associated with the material properties is one of the main factors affecting stress corrosion cracking (SCC) of structural components in nuclear power plants (NPPs). In many SCC prediction models, the stress intensity factor calculated with homogeneous materials is used to characterize the crack tip stress state. However, the mechanical and material properties in weld joints are heterogeneous, which will produce the discontinuous distribution of stress and strain nearby crack tip and affect the crack propagation. To understand the material mechanical heterogeneity effects on interface crack propagation, the specimens with ultimate tensile strength mismatch and elastic modulus mismatch were studied by using an extended finite element method (XFEM). The results indicate that the interface crack extension is easy to occur in the specimens with larger ultimate tensile strength mismatch, while the elastic modulus mismatch has little effects on crack extension. The different interface cracks in the dissimilar metal weld joints of the reactor pressure vessel used in NPPs tend to deviate from the initial direction into alloy 182, and the interface crack propagation path fluctuation is small.

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Characteristic of Interface Crack Propagation in Dissimilar Weld Joints

Cited by 2 publications

References 2 publications

A Numerical Approach to Analyze Detail Mechanical Characteristic at the Crack Tip of SCC in Dissimilar Metal Welded Joints

A Numerical Approach to Analyze Detail Mechanical Characteristic at the Crack Tip of SCC in Dissimilar Metal Welded Joints

Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints

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