Abstract

Grade 91 (9Cr-1Mo) steel was subjected to various heat treatments and then to high-pressure torsion (HPT) at different temperatures. Its microstructure was studied using transmission electron microscopy (TEM) and X-ray diffraction (XRD). Effects of the tempering temperature and the HPT temperature on the microstructural features and microhardness in the ultrafine-grained (UFG) Grade 91 steel were researched. The study of the UFG structure formation takes into account two different microstructures observed: before HPT in both samples containing martensite and in fully ferritic samples.

Department(s)

Materials Science and Engineering

Comments

The authors are grateful to the Russian Ministry of Education and Science within the project part of the program for universities through project No. 16.2061.2017/4.6.

Keywords and Phrases

Ferritic/Martensitic Steel; High-Pressure Torsion; Ultrafine-Grained Structure

International Standard Serial Number (ISSN)

1996-1944; 1996-1944

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2018 The Authors, All rights reserved.

Creative Commons Licensing

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

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