Distribution characteristics of inclusions along with the surface sliver defect on the exposed panel of automobile: A quantitative electrolysis method

Xiao-qian Pan; Jian Yang; Joohyun Park; Hideki Ono

doi:10.1007/s12613-020-1973-8

Volume 27 Issue 11

Nov. 2020

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > 27(11): 1489-1498

Xiao-qian Pan, Jian Yang, Joohyun Park, and Hideki Ono, Distribution characteristics of inclusions along with the surface sliver defect on the exposed panel of automobile: A quantitative electrolysis method, Int. J. Miner. Metall. Mater., 27(2020), No. 11, pp. 1489-1498. https://doi.org/10.1007/s12613-020-1973-8

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Xiao-qian Pan, Jian Yang, Joohyun Park, and Hideki Ono, Distribution characteristics of inclusions along with the surface sliver defect on the exposed panel of automobile: A quantitative electrolysis method, Int. J. Miner. Metall. Mater., 27(2020), No. 11, pp. 1489-1498. https://doi.org/10.1007/s12613-020-1973-8

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Research Article

Distribution characteristics of inclusions along with the surface sliver defect on the exposed panel of automobile: A quantitative electrolysis method

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Corresponding author:
Jian Yang E-mail: yang_jian@t.shu.edu.cn
Received: 28 September 2019; Revised: 22 December 2019; Accepted: 26 December 2019; Available online: 8 January 2020

Abstract

Abstract

The specific distribution characteristics of inclusions along with the sliver defect were analyzed in detail to explain the formation mechanism of the sliver defect on the automobile exposed panel surface. A quantitative electrolysis method was used to compare and evaluate the three-dimensional morphology, size, composition, quantity, and distribution of inclusions in the defect and non-defect zone of automobile exposed panel. The Al₂O₃ inclusions were observed to be aggregated or chain-like shape along with the sliver defect of about 3–10 μm. The aggregation sections of the Al₂O₃ inclusions are distributed discretely along the rolling direction, with a spacing of 3–7 mm, a length of 6–7 mm, and a width of about 3 mm. The inclusion area part is 0.04%–0.16% with an average value of 0.08%, the inclusion number density is 40 mm⁻² and the inclusion average spacing is 25.13 μm. The inclusion spacing is approximately 40–160 μm, with an average value of 68.76 μm in chain-like inclusion parts. The average area fraction and number density of inclusions in the non-defect region were reduced to about 0.002% and 1–2 mm⁻², respectively, with the inclusion spacing of 400 μm and the size of Al₂O₃ being 1–3 μm.
- automobile exposed panel;
- sliver defect;
- quantitative electrolysis;
- three-dimensional inclusions;
- aggregated inclusions;
- chain-like inclusions

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