Discussion of Fatigue Data for Austenitic Stainless Steels

Wilhelm, P., Steinmann, P. and Rudolph, J. (2014) Discussion of Fatigue Data for Austenitic Stainless Steels. In: ASME 2014 Pressure Vessels and Piping Conference, PVP 2014, Anaheim, United States, 20-24 July 2014, ISBN 9780791845981

Abstract

The first results of a detailed fatigue model for austenitic stainless steels in general and for the grades 1.4541 and 1.4550 are presented to describe the effect of the light water reactor (LWR) coolant environments on the fatigue life. The statistical evaluations are based on strain (and load) controlled test series from different institutions. The compiled fatigue data include not only results from America (Keller (1971), Conway (1975), Hale (1977), and Argonne National Laboratory (ANL)(1999- 2005)), but also from Europe (Solin (2006), Le Duff (2008- 2010), De Baglion (2011, 2012), Huin (2013), ...) and Japan (Kanasaki (1997)). The fatigue life is defined as the number of cycles necessary for tensile stress to drop 25 percent from its peak value. Fatigue lives defined by other failure criteria are normalized to the load reduction of 25 percent, before the statistical analysis is performed. The fatigue data are expressed in terms of the LANGER equation and the parameter "material variability and data scatter" is quantified. Additionally, fatigue data in air of roughened specimens are compiled and discussed. A reduction factor of 2.5 on number of cycles is derived to cover the maximum allowed surface roughness. Based on the derived best-fit curves, design-curves in air and, in a second step, environmentally assisted fatigue (EAF) curves for LWR environments, which consider temperature, strain rate, dissolved oxygen content, and hold-time effects, will be incorporated in the detailed fatigue model in the future.

• Item Type: Conference Proceedings
• Additional Information: American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP Volume 1, 2014.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Steinmann, Professor Paul
• Authors: Wilhelm, P., Steinmann, P., and Rudolph, J.
• College/School: College of Science and Engineering > School of Engineering > Infrastructure and Environment
• Journal Name: American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
• ISSN: 0277-027X
• ISBN: 9780791845981