Mechanisms of Cyclic Plasticity of a Ferrite-Bainite 21/4Cr1Mo Steel after Long-term Service at High Temperature

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概要

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• LCF tests were carried out at 565°C on a ferrite-bainite 241Cr1Mo steel that has been taken from a power plant component after a 160000 h service time. Before fatigue, a detailed preliminary analysis of the microstructure was first performed not only in terms of precipitates but also in terms of dislocation cell subboundaries present in the bainitic grains. Strain cycling globally led to a softening of the alloy which can be preceded by a hardening period depending on the strain amplitude. A fatigue cellular structure developed in the ferritic grains whatever the strain level. In the bainite, it was possible by CBED to show a rotation of the preexisting cells as indicated by the orientation measurements. The mechanisms of cyclic plasticity of the 241Cr1Mo steel is thus explained by considering the individual behavior of each phase.

• 社団法人 日本鉄鋼協会の論文
• 1999-11-15

著者

• Vogt J‐b

  Univ. Sci. Et Technol. Lille. Villeneuve D'ascq Fra

• Vogt J.-b.

  Universite De Lille I Laboratoire De Metallurgie Physique Associe A I'ura Cnrs 234

• ARGILLER S.

  Electricite de France, Site des renardieres, Departement Etudes des Materiaux

• LEON J.

  Universite des Sciences et Technologies de Lille, Laboratoire de Metallurgie Physique et Genie des M

• MASSOUD J.-P.

  Electricite de France, Site des renardieres, Departement Etudes des Materiaux

• PRUNIER V.

  Electricite de France, Site des renardieres, Departement Etudes des Materiaux

• Prunier V.

  Electricite De France Site Des Renardieres Departement Etudes Des Materiaux

• Argiller S.

  Electricite De France Site Des Renardieres Departement Etudes Des Materiaux

• Massoud J.-p.

  Electricite De France Site Des Renardieres Departement Etudes Des Materiaux

• Leon J.

  Universite Des Sciences Et Technologies De Lille Laboratoire De Metallurgie Physique Et Genie Des Materiaux

関連論文

• Sensitivity of a High Nitrogen Austenitic Stainless Steel to Fatigue Crack Initiation
• High Temperature Low Cycle Fatigue of 2 1/4 Cr1Mo Steels : Role of Microstructure and Effect of Environment(Special Issue on Creep and Fatigue at Elevated Temperatures)
• Mechanisms of Cyclic Plasticity of a Ferrite-Bainite 21/4Cr1Mo Steel after Long-term Service at High Temperature

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