Quantification of the Severity of Ridging in Ferritic Stainless Steel Sheets Using a Profilometric Technique

Suresh Kodukula, Thomas Ohligschläger, David Porter

Research output: Contribution to journalArticleScientificpeer-review

Abstract

A new method to quantify the ridging phenomenon in ferritic stainless steels has been developed based on the evaluation of surface profiles after the tensile elongation of 100 mm wide sheet specimens. The ridging components of the surface profiles are extracted by a tailored spline filtering procedure. A ridging index is proposed to quantify the severity of the surface defect based on surface profile height and spac-ing parameters. The procedure is independent of the type of profilometer used as long as unfiltered raw profiles can be recorded. The reproducibility of the measurement method and its correlation with the visual assessment of strained specimens is discussed.
Original languageEnglish
Article numberISIJINT-2020-137
Number of pages7
JournalISIJ International
DOIs
Publication statusE-pub ahead of print - 11 Sep 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • ferritic stainless steels
  • ridging
  • ridging index
  • surface profile
  • spline filtering

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