[1] Cheng Jiaming, Gao Yiqi, Yan Huadong, Sun Sijia, et al. Statistical analysis of nondestructive testing resultsof cast steel joints in civil engineering structures [J]. Journal of Southeast University (English Edition), 2022, 38 (1): 1-8. [doi:10.3969/j.issn.1003-7985.2022.01.001]

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Statistical analysis of nondestructive testing resultsof cast steel joints in civil engineering structures()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

38

Issue:

2022 1

Page:

1-8

Research Field:

Materials Sciences and Engineering

Publishing date:

2022-03-20

Info

Title:

Statistical analysis of nondestructive testing resultsof cast steel joints in civil engineering structures

Author(s):

Cheng Jiaming;  Gao Yiqi;  Yan Huadong;  Sun Sijia;  Jin Hui

Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing 211189, China
School of Civil Engineering, Southeast University, Nanjing 211189, China

Keywords:

steel casting;  casting defect;  nondestructive testing;  statistical analysis

PACS:

TU512.9

DOI:

10.3969/j.issn.1003-7985.2022.01.001

Abstract:

To study the distribution law and random characteristics of casting defects in steel castings, 24 civil engineering structural cast steel joints were divided into two groups: simple cast steel joints and complex cast steel joints. Three kinds of nondestructive testing(NDT)methods, namely, visual, magnetic particle, and ultrasonic inspections, were used to detect the macroscopic defects in joints. The NDT results were then statistically analyzed. The results show that the unfused core support is a common defect of complex cast steel joints, and the defect can be seen visually, so excavation and repair welding should be carried out before castings leave factories. Casting cracks are extremely likely to occur in the intersection area of tubes, which is called the ultrasonic inspection blind zone. The occurrence probability of gas pores on simple cast steel joints is the largest, and the occurrence probability of core support incomplete fusions on complex cast steel joints is the largest. However, when cast steel joints are counted as a whole sample, the occurrence probability of gas pores is larger than that of core support incomplete fusions. Therefore, it is the most common defect in cast steel joints.

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Memo

Memo:

Biographies: Cheng Jiaming(1995—), male, Ph.D. candidate; Jin Hui(corresponding author), female, doctor, professor, jinhui@seu.edu.cn.
Foundation items: The National Key R & D Program of China(No.2017YFC0805100), the National Natural Science Foundation of China(No.51578137), the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Open Research Fund Program of Jiangsu Key Laboratory of Engineering Mechanics.
Citation: Cheng Jiaming, Gao Yiqi, Yan Huadong, et al. Statistical analysis of nondestructive testing results of cast steel joints in civil engineering structures[J].Journal of Southeast University(English Edition), 2022, 38(1):1-8.DOI:10.3969/j.issn.1003-7985.2022.01.001.

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