475°C Embrittlement and Room Temperature Fatigue of Duplex Stainless Steel
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
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Relation |
http://eprints.nmlindia.org/6084/
http://eprints.nmlindia.org/6084 |
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Title |
475°C Embrittlement and Room Temperature Fatigue of Duplex Stainless Steel
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Creator |
Wackermann, Ken
Sahu, J K Christ, H J |
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Subject |
Failure Analysis
Materials Charcterization |
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Description |
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.
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Date |
2010
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Type |
Conference or Workshop Item
PeerReviewed |
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Format |
application/pdf
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Language |
en
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Identifier |
http://eprints.nmlindia.org/6084/1/78_proceeding.pdf.pdf
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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