University of Oulu

Suresh Kodukula, Timo Manninen, David Porter, Estimation of Lankford Coefficients of Austenitic and Ferritic Stainless Steels using Mean Grain Orientations from Micro-texture Measurements, ISIJ International, 2021, Volume 61, Issue 1, Pages 401-407, Released January 16, 2021, [Advance publication] Released November 04, 2020, Online ISSN 1347-5460, Print ISSN 0915-1559,

Estimation of Lankford coefficients of austenitic and ferritic stainless steels using mean grain orientations from micro-texture measurements

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Author: Kodukula, Suresh1,2; Manninen, Timo1; Porter, David2
Organizations: 1Outokumpu Process R&D, Tornio, 95490 Finland
2Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, 90014 Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.2 MB)
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Language: English
Published: Iron and Steel Institute of Japan, 2021
Publish Date: 2021-05-07


A new method to calculate the plastic anisotropy r-values of austenitic and ferritic stainless steels has been developed. The mean orientation of individual grains is obtained from SEM-EBSD data and r-values for individual grains are calculated by weighting all slip systems according to their Schmid factors. Calculated and measured r-values are in good agreement for austenitic stainless steels. However, in ferritic stainless steels, which are highly anisotropic, good agreement requires the introduction of a Schmid factor threshold below which slip systems are inactive. The present method can be used to estimate local differences in r-values in ferritic stainless steels showing the local variations in texture responsible for ridging.

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Series: ISIJ international
ISSN: 0915-1559
ISSN-E: 1347-5460
ISSN-L: 0915-1559
Volume: 61
Issue: 1
Pages: 401 - 407
DOI: 10.2355/isijinternational.ISIJINT-2020-256
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 (