TEM Study of Martensite Microstructure in the Junctions of Laths in Low-Carbon Chromium Steel after LCF III

Tamaz Eterashvili; T. Dzigrashvili; M. Vardosanidze

doi:10.4028/www.scientific.net/KEM.827.306

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 827TEM Study of Martensite Microstructure in the...

TEM Study of Martensite Microstructure in the Junctions of Laths in Low-Carbon Chromium Steel after LCF III

Abstract:

TEM study of junctions between martensite packets (laths) and their microstructure in low-carbon martensitic steel were studied. It was revealed that formation of slip bands commences at junctions between laths. Heavy changes in microstructure occur at junctions of packets and in the near-boundary laths because of plastic deformation of martensite. A number of typical junctions between the laths after LCF are considered. Deformation process within the individual packet occurs inhomogeneously, some of the laths deform more heavily than the others. The coarser slip bands group within large laths and run along their whole lengths. It was shown that the above microstructure changes strongly affect the cyclic fracture of the steel. Some concrete sites of microcrack initiation are indicated.

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Periodical:

Key Engineering Materials (Volume 827)

Pages:

306-311

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.827.306

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Online since:

December 2019

Authors:

Tamaz Eterashvili*, T. Dzigrashvili, M. Vardosanidze

Keywords:

Junction, Martensite, Microstructure, Packet, Slip Band

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References

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