Marinelli, María Cecilia and Giertler, Alexander and Sahu, J K and Herenu, Silvina and Alvarez-Armas, Iris and Krupp, Ulrich (2012) The Effect of Ferrite Embrittlement in Duplex Steel on Fatigue Crack Propagation from the Low (LCF) to the Very High Cycle Fatigue (VHCF) Regime. In: 19th EUROPEAN CONFERENCE ON FRACTURE, Fracture Mechanics for Durability, Reliability and Safety, August 26-31, 2012, Kazan, Russia.
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Abstract
The excellent combination of mechanical properties and corrosion resistance of duplex stainless steel is obtained from balanced amount of ferrite and austenite in the microstructure. However, this grade of steel embrittles when exposed in the temperature range of 280–500ºC limiting its application to temperatures below 280ºC. To study the effect of embrittlemnt on fatigue behavior at high strain ranges, plastic-strain- controlled LCF test and at low strain ranges, stress-controlled HCF/VHCF tests were conducted on 1.4462 duplex steel and accompanied by SEM analysis in combination with EBSD. Extensive TEM was done to study the micromechanism of fatigue crack initiation and propagation across the strain ranges.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Official URL/DOI: | http://eprints.nmlindia.org/6083 |
| Uncontrolled Keywords: | duplex stainless steels, 475° embrittlement, fatigue crack initiation and propagation |
| Divisions: | Material Science and Technology |
| ID Code: | 6083 |
| Deposited By: | Dr. A K Sahu |
| Deposited On: | 20 Sep 2012 11:00 |
| Last Modified: | 20 Sep 2012 11:00 |
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