Nitrogen strengthening of a martensitic steel: Relation between microstructure and mechanical behavior

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(96)00379-5· OSTI ID:524537

France, C ^[1]; Kloecker, H; Coze, J Le; Fraczkiewicz, A ^[2]

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1. Centre de Recherches Ascometal et Unimetal, Amneville (France)
2. Ecole des Mines de Saint-Etienne (France)

Four synthetic martensitic steels containing different nitrogen levels were prepared by powder technique and HIP. The base composition of the four alloys corresponds to H13 steel except for the carbon content. The nitrogen contents of the difficult specimens are, respectively, 0.2, 0.5, 1.0 and 1.5 wt%. The flow stresses and Young`s moduli of the four alloys were determined between room temperature and 600 C. The volume fractions of micron-size and manometric second-phase particles were determined as a function of the total nitrogen content. The mechanical and microstructural analyses show that nitrogen strengthening of martensitic tool steel is suitably described by Orowan`s mechanism.

• OSTI ID: 524537
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 7 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FLOW STRESS
MARTENSITIC STEELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NITROGEN
PARTICLES
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
YOUNG MODULUS