Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints
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...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/6593982 |
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| author | Fu-qiang Yang He Xue Ling-yan Zhao Xiu-rong Fang |
| author_facet | Fu-qiang Yang He Xue Ling-yan Zhao Xiu-rong Fang |
| author_sort | Fu-qiang Yang |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-48422a19bd8c40edab5a8235c0664e4a |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-48422a19bd8c40edab5a8235c0664e4a2025-02-03T06:01:01ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/65939826593982Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld JointsFu-qiang Yang0He Xue1Ling-yan Zhao2Xiu-rong Fang3School of Science, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Mechanical Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Science, Xi’an University of Science & Technology, Xi’an 710054, ChinaSchool of Mechanical Engineering, Xi’an University of Science & Technology, Xi’an 710054, ChinaThe 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.http://dx.doi.org/10.1155/2019/6593982 |
| spellingShingle | Fu-qiang Yang He Xue Ling-yan Zhao Xiu-rong Fang Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints Advances in Materials Science and Engineering |
| title | Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints |
| title_full | Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints |
| title_fullStr | Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints |
| title_full_unstemmed | Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints |
| title_short | Effects of Welded Mechanical Heterogeneity on Interface Crack Propagation in Dissimilar Weld Joints |
| title_sort | effects of welded mechanical heterogeneity on interface crack propagation in dissimilar weld joints |
| url | http://dx.doi.org/10.1155/2019/6593982 |
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