Microstructure and Mechanical Propertiesof a Nitride-Strengthened Reduced ActivationFerritic/Martensitic Steel

Qiangguo Zhou; Wenfeng Zhang; Wei Yan; Wei Wang; Wei Sha; Yiyin Shan; Ke Yang

doi:10.1007/s11661-012-1311-5

Microstructure and Mechanical Propertiesof a Nitride-Strengthened Reduced ActivationFerritic/Martensitic Steel

Qiangguo Zhou, Wenfeng Zhang, Wei Yan, Wei Wang, Wei Sha, Yiyin Shan, Ke Yang

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Abstract

Nitride-strengthened reduced activation ferritic/martensitic (RAFM) steels are developed taking advantage of the high thermal stability of nitrides. In the current study, the microstructure and mechanical properties of a nitride-strengthened RAFM steel with improved composition were investigated. Fully martensitic microstructure with fine nitrides dispersion was achieved in the steel. In all, 1.4 pct Mn is sufficient to suppress delta ferrite and assure the steel of the full martensitic microstructure. Compared to Eurofer97, the steel showed similar strength at room temperature but higher strength at 873 K (600 °C). The steel exhibited very high impact toughness and a low ductile-to-brittle transition temperature (DBTT) of 243 K (–30 °C), which could be further reduced by purification.

Original language	English
Pages (from-to)	5079-5087
Number of pages	9
Journal	Metallurgical and Materials Transactions A
Volume	43
Issue number	13
Early online date	19 Jul 2012
DOIs	https://doi.org/10.1007/s11661-012-1311-5
Publication status	Published - Dec 2012

Keywords

Nitride strengthened
Reduced activation
Toughness
Martensitic steel
Inclusion

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10.1007/s11661-012-1311-5

Microstructure and MechanicalAccepted author manuscript, 9.01 MB

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title = "Microstructure and Mechanical Propertiesof a Nitride-Strengthened Reduced ActivationFerritic/Martensitic Steel",

abstract = "Nitride-strengthened reduced activation ferritic/martensitic (RAFM) steels are developed taking advantage of the high thermal stability of nitrides. In the current study, the microstructure and mechanical properties of a nitride-strengthened RAFM steel with improved composition were investigated. Fully martensitic microstructure with fine nitrides dispersion was achieved in the steel. In all, 1.4 pct Mn is sufficient to suppress delta ferrite and assure the steel of the full martensitic microstructure. Compared to Eurofer97, the steel showed similar strength at room temperature but higher strength at 873 K (600 °C). The steel exhibited very high impact toughness and a low ductile-to-brittle transition temperature (DBTT) of 243 K (–30 °C), which could be further reduced by purification.",

keywords = "Nitride strengthened, Reduced activation, Toughness, Martensitic steel, Inclusion",

author = "Qiangguo Zhou and Wenfeng Zhang and Wei Yan and Wei Wang and Wei Sha and Yiyin Shan and Ke Yang",

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doi = "10.1007/s11661-012-1311-5",

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TY - JOUR

T1 - Microstructure and Mechanical Propertiesof a Nitride-Strengthened Reduced ActivationFerritic/Martensitic Steel

AU - Zhou, Qiangguo

AU - Zhang, Wenfeng

AU - Yan, Wei

AU - Wang, Wei

AU - Sha, Wei

AU - Shan, Yiyin

AU - Yang, Ke

PY - 2012/12

Y1 - 2012/12

N2 - Nitride-strengthened reduced activation ferritic/martensitic (RAFM) steels are developed taking advantage of the high thermal stability of nitrides. In the current study, the microstructure and mechanical properties of a nitride-strengthened RAFM steel with improved composition were investigated. Fully martensitic microstructure with fine nitrides dispersion was achieved in the steel. In all, 1.4 pct Mn is sufficient to suppress delta ferrite and assure the steel of the full martensitic microstructure. Compared to Eurofer97, the steel showed similar strength at room temperature but higher strength at 873 K (600 °C). The steel exhibited very high impact toughness and a low ductile-to-brittle transition temperature (DBTT) of 243 K (–30 °C), which could be further reduced by purification.

AB - Nitride-strengthened reduced activation ferritic/martensitic (RAFM) steels are developed taking advantage of the high thermal stability of nitrides. In the current study, the microstructure and mechanical properties of a nitride-strengthened RAFM steel with improved composition were investigated. Fully martensitic microstructure with fine nitrides dispersion was achieved in the steel. In all, 1.4 pct Mn is sufficient to suppress delta ferrite and assure the steel of the full martensitic microstructure. Compared to Eurofer97, the steel showed similar strength at room temperature but higher strength at 873 K (600 °C). The steel exhibited very high impact toughness and a low ductile-to-brittle transition temperature (DBTT) of 243 K (–30 °C), which could be further reduced by purification.

KW - Nitride strengthened

KW - Reduced activation

KW - Toughness

KW - Martensitic steel

KW - Inclusion

U2 - 10.1007/s11661-012-1311-5

DO - 10.1007/s11661-012-1311-5

M3 - Article

VL - 43

SP - 5079

EP - 5087

JO - Metallurgical and Materials Transactions A

JF - Metallurgical and Materials Transactions A

SN - 1073-5623

IS - 13

ER -

Microstructure and Mechanical Propertiesof a Nitride-Strengthened Reduced ActivationFerritic/Martensitic Steel

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Keywords

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