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A comparative study on the precipitation of the {sigma} phase in a superferritic and in a duplex stainless steel; Untersuchung zum Vergleich der {sigma}-Phasenausscheidung in einem rostfreien Superferrit und einem Duplex-Stahl

Abstract

The kinetics and the precipitation of the {sigma} phase within the ferrite phase of two stainless steels - the first a fully ferritic one (W.-Nr. 1.4575) and the second, a ferritic-austenitic duplex steel (W.-Nr. 1.4462) - have been studied. Both steels presented almost the same chemical composition of the ferrite phase. While a eutectoid decomposition of ferrite into {sigma} phase and austenite occurred in the duplex steel, a traditional {sigma} phase precipitation took place in the superferritic steel. The time-temperature-transformation (TTT) diagrams were determined for the beginning of {sigma} formation in the ferrite for both steels. The rate of the {sigma} phase precipitation was two orders of magnitude faster within the duplex steel compared to the superferritic one. At the same time, the nose of the TTT curve was shifted towards higher temperatures, as well as the upper precipitation temperature limits were higher for the duplex steel than for the superferritic one. Cold deformation accelerated the beginning of {sigma} precipitation in both cases. (orig.)
Authors:
Padilha, A F; Pimenta, Jr, F C; [1]  Reick, W [2] 
  1. Sao Paulo Univ. (Brazil). Dept. de Engenharia Metalurgica e de Materiais
  2. Bochum Univ. (Germany). Inst. fuer Werkstoffe
Publication Date:
Apr 01, 2001
Product Type:
Journal Article
Reference Number:
EDB-01:086392
Resource Relation:
Journal Name: Zeitschrift fuer Metallkunde; Journal Volume: 92; Journal Issue: 4; Other Information: PBD: Apr 2001
Subject:
36 MATERIALS SCIENCE; KINETICS; PRECIPITATION; FERRITE; STAINLESS STEELS; CHEMICAL COMPOSITION; EUTECTOIDS; DECOMPOSITION; AUSTENITE; TRANSFORMATIONS; DIAGRAMS; SYNTHESIS; ORDERS; DEFORMATION; FERRITIC STEELS; PHASE STUDIES; TIME DEPENDENCE; TEMPERATURE DEPENDENCE
OSTI ID:
20192556
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Journal ID: ISSN 0044-3093; ZEMTAE; TRN: DE01GB874
Submitting Site:
DE
Size:
page(s) 351-354
Announcement Date:
Oct 17, 2001

Citation Formats

Padilha, A F, Pimenta, Jr, F C, and Reick, W. A comparative study on the precipitation of the {sigma} phase in a superferritic and in a duplex stainless steel; Untersuchung zum Vergleich der {sigma}-Phasenausscheidung in einem rostfreien Superferrit und einem Duplex-Stahl. Germany: N. p., 2001. Web.
Padilha, A F, Pimenta, Jr, F C, & Reick, W. A comparative study on the precipitation of the {sigma} phase in a superferritic and in a duplex stainless steel; Untersuchung zum Vergleich der {sigma}-Phasenausscheidung in einem rostfreien Superferrit und einem Duplex-Stahl. Germany.
Padilha, A F, Pimenta, Jr, F C, and Reick, W. 2001. "A comparative study on the precipitation of the {sigma} phase in a superferritic and in a duplex stainless steel; Untersuchung zum Vergleich der {sigma}-Phasenausscheidung in einem rostfreien Superferrit und einem Duplex-Stahl." Germany.
@misc{etde_20192556,
title = {A comparative study on the precipitation of the {sigma} phase in a superferritic and in a duplex stainless steel; Untersuchung zum Vergleich der {sigma}-Phasenausscheidung in einem rostfreien Superferrit und einem Duplex-Stahl}
author = {Padilha, A F, Pimenta, Jr, F C, and Reick, W}
abstractNote = {The kinetics and the precipitation of the {sigma} phase within the ferrite phase of two stainless steels - the first a fully ferritic one (W.-Nr. 1.4575) and the second, a ferritic-austenitic duplex steel (W.-Nr. 1.4462) - have been studied. Both steels presented almost the same chemical composition of the ferrite phase. While a eutectoid decomposition of ferrite into {sigma} phase and austenite occurred in the duplex steel, a traditional {sigma} phase precipitation took place in the superferritic steel. The time-temperature-transformation (TTT) diagrams were determined for the beginning of {sigma} formation in the ferrite for both steels. The rate of the {sigma} phase precipitation was two orders of magnitude faster within the duplex steel compared to the superferritic one. At the same time, the nose of the TTT curve was shifted towards higher temperatures, as well as the upper precipitation temperature limits were higher for the duplex steel than for the superferritic one. Cold deformation accelerated the beginning of {sigma} precipitation in both cases. (orig.)}
journal = []
issue = {4}
volume = {92}
journal type = {AC}
place = {Germany}
year = {2001}
month = {Apr}
}