University of Oulu

Suresh Kodukula, Thomas Ohligschläger, David Porter, Quantification of the Severity of Ridging in Ferritic Stainless Steel Sheets Using a Profilometric Technique, ISIJ International, 2021, Volume 61, Issue 1, Pages 380-386, Released January 16, 2021, [Advance publication] Released September 11, 2020, Online ISSN 1347-5460, Print ISSN 0915-1559,

Quantification of the severity of ridging in ferritic stainless steel sheets using a profilometric technique

Saved in:
Author: Kodukula, Suresh1,2; Ohligschläger, Thomas3; Porter, David2
Organizations: 1Outokumpu Process R&D, Tornio, 95490 Finland
2Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, Oulu, 90014 Finland
3VTT Technical Research Center of Finland Ltd, VTT, 02044 Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1 MB)
Persistent link:
Language: English
Published: Iron and Steel Institute of Japan, 2021
Publish Date: 2021-05-14


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 spacing 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.

see all

Series: ISIJ international
ISSN: 0915-1559
ISSN-E: 1347-5460
ISSN-L: 0915-1559
Volume: 61
Issue: 1
Pages: 380 - 386
DOI: 10.2355/isijinternational.ISIJINT-2020-137
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Copyright information: © 2021 The Iron and Steel Institute of Japan. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs license (