Effect of long-term aging on the features of plastic deformation and fracture of ferritic-martensitic steel EP-823

The features of deformed microstructure and fracture of 12% chromium ferritic-martensitic steel EP-823 tensile specimens subjected to long-term (1000 h) aging at 580 °С are investigated by scanning and transmission electron microscopy. It is shown that they are determined by the tensile test tempera...

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Bibliographic Details
Main Authors: Polekhina, N. A., Linnik, V. V., Litovchenko, I. Yu, Almaeva, K. V., Akkuzin, S. A.
Format: Conference Proceeding
Language:English
Subjects:
Deformation effects
Dimpling
Dual phase steels
Ductile fracture
Dynamic strain aging
Ferritic stainless steels
Martensitic stainless steels
Plastic deformation
Precipitation hardening
Tensile tests
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Summary:The features of deformed microstructure and fracture of 12% chromium ferritic-martensitic steel EP-823 tensile specimens subjected to long-term (1000 h) aging at 580 °С are investigated by scanning and transmission electron microscopy. It is shown that they are determined by the tensile test temperature (20 or 700 °C). The high tensile temperature promotes the process of recovery and dynamic strain aging in the ferritic-martensitic structure. The steel ruptures by the mechanism of ductile dimple transcrystalline fracture at all temperatures.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0163696