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T-Shaped Fillet Weld Testing of 9% Ni Alloy Steel Based on Total Focusing Phased Array Technique

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Abstract

The T-shaped weld structure of LNG tank nickel-based alloy is complex and the grain of the weld is coarse and anisotropy. The conventional ultrasonic detection technique cannot effectively detect its internal defects. In this paper, the acoustic model of T-shaped weld was built based on CIVA software, the ultrasonic wave propagation characteristics and defect response in 9% Ni alloy specimen was simulated. Then, the 9% Ni alloy specimen with artificial flaws was designed, and the phased array imaging based on total focusing method was studied using double-sided array. The quantification and localization of artificial defects were successfully detected. Finally, the research results were applied to the engineering project, and the lack of penetration flaw in the T-shaped weld of one large LNG storage tank were successfully detected, which effectively ensuring the safe use of the storage tank.

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Funding

The work was supported by the NQI Project of Zhejiang Provincial Bureau of Quality and Technical Supervision (no. 20180119), EYAS project of Zhejiang Provincial Bureau of Quality and Technical Supervision (CY2022225), and Major project of Zhejiang Provincial Bureau of Quality and Technical Supervision (no. 20170143).

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Authors and Affiliations

  1. Ningbo Special Equipment Inspection and Research Institute, 315048, Ningbo, China

    Huang Huan Dong, Qian Sheng Jie, Shen Zheng Xiang, Wang Du & Chen Ding Yue

  2. College of Quality and Safety Engineering, China Jiliang University, 310018, Hangzhou, China

    Wang Qiang

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  1. Huang Huan Dong
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  2. Qian Sheng Jie
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  3. Shen Zheng Xiang
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  4. Wang Du
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  5. Chen Ding Yue
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Correspondence to Qian Sheng Jie.

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Dong, H.H., Jie, Q.S., Xiang, S.Z. et al. T-Shaped Fillet Weld Testing of 9% Ni Alloy Steel Based on Total Focusing Phased Array Technique. Russ J Nondestruct Test 58, 444–454 (2022). https://doi.org/10.1134/S1061830922060043

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  • DOI: https://doi.org/10.1134/S1061830922060043

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