Wackermann, Ken and Sahu, J K and Christ, H J (2010) 475°C Embrittlement and Room Temperature Fatigue of Duplex Stainless Steel. In: Proceedings of 18th European Conference on Fracture of Materials and Structures "Fracture of Materials and Structures from Micro to Macro Scale", D. Klingbeil, M. Vormwald, K.-G. Eulitz (Hg), 2010, DVM, Berlin.
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Abstract
Duplex stainless steels (DSSs) are two-phase materials consisting of both the ferritic and the
austenitic phase. The alloys are prone to embrittlement particularly in the temperature range
between 280°C and 512°C. This so-called 475°C embrittlement is caused by a
decomposition of the ferritic phase into a chromium-rich α' and an iron-rich α phase. The
objective of this study is to develop a better understanding of the embrittling process of DSS
of type SAF 2205. Embrittled and non-embrittled DSS was fatigue tested in stress-controlled
tests at 475°C and in strain-controlled tests at room temperature. The high temperature
fatigue tests were stopped at different cycle numbers in order to characterize the changing
material conditions by means of room-temperature tensile tests and scanning electron
microscopy pictures of the fracture surfaces.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | Duplex Stainless Steel, 475°C Embrittlement, Fatigue Testing, Tensile Properties |
| Subjects: | Materials Science > Failure Analysis Materials Science > Materials Charcterization |
| Divisions: | Material Science and Technology |
| Depositing User: | Dr. A K Sahu |
| Date Deposited: | 20 Sep 2012 05:35 |
| Last Modified: | 03 Sep 2026 07:32 |
| URI: | http://eprints.nmlindia.org/id/eprint/6084 |
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