High-temperature stress and strain partitioning in duplex stainless steel
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L. Duprez
und
N. Akdut
Abstract
The high-temperature strain partitioning in duplex stainless steel was studied by means of single-pass hot-rolling tests at 1040 and 1245 °C. By varying the temperature and the amount of reduction during the hot-rolling pass the influence of the austenite volume fraction and the strain could be investigated. By means of optical microscopy and application of the law of mixtures the partitioning of strain between the ferrite matrix and the austenite islands was obtained. A distinct strain partitioning was observed. At 1245 °C, the ferrite-austenite strain ratio increased from 2.8 at 30% rolling reduction to 4.2 at 80% reduction. In addition, single-hit hot-torsion tests were performed on single-phase ferritic and austenitic materials, as well as on the duplex stainless steel in order to study the stress partitioning between the phases. The austenite-ferrite stress ratio was found to increase up to 3.5 at 1200 °C. The torsion tests confirmed that the deformation behaviour of the duplex stainless steel is mainly determined by the deformation behaviour of the ferritic matrix, in particular during the early stages of deformation. The strain concentration in the ferrite was found to result in a delay of the dynamic recrystallisation of the austenite.
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© 2002 Carl Hanser Verlag, München
Artikel in diesem Heft
- Frontmatter
- Articles/Aufsätze
- Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy
- Experimental and thermodynamic assessment of the Fe –Gd–Zr system
- Phase diagram of the Fe –Co –Ti system at 1073 K
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- Identification of precipitates in 6013 aluminum alloy (Al –Mg –Si –Cu)
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- Microstructure and compressive properties of in situ synthesized TiC/Ti composites
- Effect of Al on the glass forming ability of Zr–Ni –Cu–Al alloys
- Fcc-hcp transformation-related internal friction in Fe –Mn alloys
- High-temperature stress and strain partitioning in duplex stainless steel
- Load sequence effects in the high cycle fatigue of two ferrite-pearlite microalloyed steels
- Characterization of intermetallic compounds formed during the interfacial reactions of liquid Sn and Sn– 58Bi solders with Ni substrates
- Notifications/Mitteilungen
- Personal/Personelles
Artikel in diesem Heft
- Frontmatter
- Articles/Aufsätze
- Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy
- Experimental and thermodynamic assessment of the Fe –Gd–Zr system
- Phase diagram of the Fe –Co –Ti system at 1073 K
- Copper concentration inside Guinier-Preston I zones formed in an Al –Cu alloy
- Identification of precipitates in 6013 aluminum alloy (Al –Mg –Si –Cu)
- Redistribution of phosphorus and carbon in steel weldments
- Microstructure and compressive properties of in situ synthesized TiC/Ti composites
- Effect of Al on the glass forming ability of Zr–Ni –Cu–Al alloys
- Fcc-hcp transformation-related internal friction in Fe –Mn alloys
- High-temperature stress and strain partitioning in duplex stainless steel
- Load sequence effects in the high cycle fatigue of two ferrite-pearlite microalloyed steels
- Characterization of intermetallic compounds formed during the interfacial reactions of liquid Sn and Sn– 58Bi solders with Ni substrates
- Notifications/Mitteilungen
- Personal/Personelles
