Metallurgy

Materials science

Orientation (vector space)

Carbide

Creep

Grain boundary

Mathematics

Microstructure

Geometry

Tempering

Diffusionless transformation

Crystallography

Chemistry

Martensite

The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics

The orientation relationships of M23C6 carbides in a martensitic creep resistant steel were studied. Almost all M23C6 carbides were located at (sub)grain boundaries after tempering and aging. The carbides were slightly elongated along the boundary planes and obeyed the Kurdjumov-Sachs, Nishiyama-Wassermann, and Pitsch orientation relationships as well as two new orientation relationships, that is and , with α-Fe matrix. On the other hand, the M23C6 particles in the neck portion of crept specimen lost their orientation relationships with α-Fe. Keywords: temperingtransmission electron microscopymartensitic steelcreepM23C6 orientation relationship Acknowledgements The study was supported by Department of Education and Science, Russian Federation, grant No. 02.523.12.3019. Authors are grateful to the staff of Joint Research Centre, Belgorod State University, for their assistance with structural and mechanical characterizations.

The crystallography of M<sub>23</sub>C<sub>6</sub>carbides in a martensitic 9% Cr steel after tempering, aging and creep

The crystallography of M23C6carbides in a martensitic 9% Cr steel after tempering, aging and creep

The crystallography of M₂₃C₆carbides in a martensitic 9% Cr steel after tempering, aging and creep