Structural changes in refractory steel 10Kh9V2MFBR due to creep at 650°C

Changes in the structure of steel 10Kh9V2MFBR after creep tests are studied. It is shown that annealing causes inconsiderable changes in the structure of troostomartensite formed due to tempering in the head of a specimen. In the functional part of the specimen, on the contrary, the place of the ini...

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Bibliographic Details
Published in:Metal science and heat treatment 2010-09, Vol.52 (3-4), p.111-117
Main Authors: Dudko, V. A., Belyakov, A. N., Skorobogatykh, V. N., Shchenkova, I. A., Kaibyshev, R. O.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Engineering Thermodynamics
Hardness
Heat and Mass Transfer
Materials Science
Metallic Materials
Steel
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Summary:Changes in the structure of steel 10Kh9V2MFBR after creep tests are studied. It is shown that annealing causes inconsiderable changes in the structure of troostomartensite formed due to tempering in the head of a specimen. In the functional part of the specimen, on the contrary, the place of the initial troostomartensite is taken by coarse equiaxed subgrains; the density of the lattice dislocations decreases by an order of magnitude. The change in the microstructure in the process of creep causes a more than 30% decrease in the hardness of the material.
ISSN:0026-0673
1573-8973
DOI:10.1007/s11041-010-9241-6