Reference blocks for penetrant testing

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Abstract

Reference blocks for penetrant testing have been developed, allowing measurements using an optical microscope of both the opening width of surface defects and their depth. In this case, the condition that defect cavities do not extend onto the side faces of the blocks is met. Experimental data on the dependence of the defect’s indications area after development on their width (0.5—8.5 µm) and depth (40—860 mm) are presented. Using correlation analysis, the statistical significance of the above parameters is shown.

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About the authors

N. V. Delenkovsky

Institute of Applied Physics

Author for correspondence.
Email: delenkovsky@iaph.bas-net.by
Belarus, 220072 Minsk, Akademicheskaya str., 16

A. B. Gnusin

Institute of Applied Physics

Email: dubelxp@gmail.com
Belarus, 220072 Minsk, Akademicheskaya str., 16

References

  1. GOST R ISO 3452-2—2009. Non-destructive testing. Penetrant testing. Part 2. Testing of penetrant materials. M.: Standardinform. 2011.
  2. GOST R ISO 3452-3—2009. Non-destructive testing. Penetrant testing. Part 3. Reference test blocks. M.: Standardinform. 2011.
  3. GOST 18442—80. Non-destructive testing. Capillary methods. General requirements. M.: Izdatelstvo standartov. 1987
  4. GOST R 50.05.09—2018. Conformity assessment system for the use of nuclear energy. Conformity assessment in the form of control. Unified methods. Liquid penetrant control. M.: Standardinform. 2018.
  5. RD-13-06—2006. Methodological recommendations on the procedure for carrying out penetrant testing of technical devices and structures used and operated at hazardous production facilities. 2011.
  6. STB 1172—99. Non-destructive testing. Penetrant testing. General requirements. Mn.: BelGISS, 1999.
  7. Migoun N.P., Delenkovsky N.V., Gnusin A.B. New means for determining the sensitivity of product families for penetrant testing // Metrology and instrument-making. 2007. № 2. P. 16—18.
  8. Delenkovsky N.V., Gnusin A.B. Estimation of the depth of surface defects in penetrant testing // Russian Journal of Nondestructive Testing. 2017. №3. P. 74—78.
  9. Delenkovsky N.V. Patent № 13255. Reference test block for penetrant testing // Republic of Belarus, National Center for Intellectual Property, 2023.08.30.
  10. Migoun N.P., Gnusin A.B., Volovich I.V. A computerized system determines the quality of penetrant materials // Industrial Safety. 2004. № 1. P. 34—36.

Supplementary files

Supplementary Files
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2. Fig. 1. Reference sample for capillary flaw detection

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3. Fig. 2. Results of luminescent capillary inspection of a specimen with 5 defects with identical openings of 2-3 μm and variable depths of 40-640 μm (indicated from above)

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4. Fig. 3. Dependences of areas of defect traces on their depths in the range of 40-850 microns: a - defect length L = 17 mm; b - L = 15 mm. Penetrant: Bycotest FP42

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5. Fig. 4. Dependences of areas of defect traces on their opening widths in the range of 0.5-8.5 microns: a - defect length L = 17 mm; b - L = 15 mm. Penetrant: Bycotest FP42

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6. Fig. 5. Dependences of areas of defect traces on their depths (a) and opening widths (b). Penetrant: U88; defect length L = 17 mm

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