Ferritic phase transformation to improve creep properties of martensitic high Cr steels

Ernst Plesiutschnig; Coline Beal; Christof Sommitsch; Stefan Paul; Günter Zeiler

doi:10.1016/j.scriptamat.2016.05.033

Ferritic phase transformation to improve creep properties of martensitic high Cr steels

Ernst Plesiutschnig, Coline Beal, Christof Sommitsch, Stefan Paul, Günter Zeiler

Institute of Materials Science, Joining and Forming (3030)

Research output: Contribution to journal › Article › peer-review

Abstract

Creep properties of two 9% Cr steels, heat treated based on a quenching and partitioning concept are investigated. Austenite is partly transformed into martensite during interrupted quenching. Due to the new interfaces and the deformed retained austenite, it is possible to transform the retained austenite into ferrite and precipitates during subsequent tempering. The kinetics of this transformation is described by the Kolgomorov-Johnson-Mehl-Avrami equation. Creep rupture times are improved by more than 50% compared to conventional heat treated samples. It is expected that this heat treatment improves the creep properties of the entire class of 8-13% Cr steels.

Original language	English
Pages (from-to)	98-101
Journal	Scripta Materialia
Volume	122
DOIs	https://doi.org/10.1016/j.scriptamat.2016.05.033
Publication status	Published - 2016

Keywords

isothermal heat treatments
quenching and partitioning
phase transformation kinetics
martensitic steels
creep test

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10.1016/j.scriptamat.2016.05.033

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title = "Ferritic phase transformation to improve creep properties of martensitic high Cr steels",

abstract = "Creep properties of two 9% Cr steels, heat treated based on a quenching and partitioning concept are investigated. Austenite is partly transformed into martensite during interrupted quenching. Due to the new interfaces and the deformed retained austenite, it is possible to transform the retained austenite into ferrite and precipitates during subsequent tempering. The kinetics of this transformation is described by the Kolgomorov-Johnson-Mehl-Avrami equation. Creep rupture times are improved by more than 50% compared to conventional heat treated samples. It is expected that this heat treatment improves the creep properties of the entire class of 8-13% Cr steels.",

keywords = "isothermal heat treatments, quenching and partitioning, phase transformation kinetics, martensitic steels, creep test",

author = "Ernst Plesiutschnig and Coline Beal and Christof Sommitsch and Stefan Paul and G{\"u}nter Zeiler",

year = "2016",

doi = "10.1016/j.scriptamat.2016.05.033",

language = "English",

volume = "122",

pages = "98--101",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Ferritic phase transformation to improve creep properties of martensitic high Cr steels

AU - Plesiutschnig, Ernst

AU - Beal, Coline

AU - Sommitsch, Christof

AU - Paul, Stefan

AU - Zeiler, Günter

PY - 2016

Y1 - 2016

N2 - Creep properties of two 9% Cr steels, heat treated based on a quenching and partitioning concept are investigated. Austenite is partly transformed into martensite during interrupted quenching. Due to the new interfaces and the deformed retained austenite, it is possible to transform the retained austenite into ferrite and precipitates during subsequent tempering. The kinetics of this transformation is described by the Kolgomorov-Johnson-Mehl-Avrami equation. Creep rupture times are improved by more than 50% compared to conventional heat treated samples. It is expected that this heat treatment improves the creep properties of the entire class of 8-13% Cr steels.

AB - Creep properties of two 9% Cr steels, heat treated based on a quenching and partitioning concept are investigated. Austenite is partly transformed into martensite during interrupted quenching. Due to the new interfaces and the deformed retained austenite, it is possible to transform the retained austenite into ferrite and precipitates during subsequent tempering. The kinetics of this transformation is described by the Kolgomorov-Johnson-Mehl-Avrami equation. Creep rupture times are improved by more than 50% compared to conventional heat treated samples. It is expected that this heat treatment improves the creep properties of the entire class of 8-13% Cr steels.

KW - isothermal heat treatments

KW - quenching and partitioning

KW - phase transformation kinetics

KW - martensitic steels

KW - creep test

U2 - 10.1016/j.scriptamat.2016.05.033

DO - 10.1016/j.scriptamat.2016.05.033

M3 - Article

SN - 1359-6462

VL - 122

SP - 98

EP - 101

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Ferritic phase transformation to improve creep properties of martensitic high Cr steels

Abstract

Keywords

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