Skip to main content

Research Repository

Advanced Search

On the microstructural evolution in 12% Cr turbine steel during low cycle fatigue at elevated temperature

Rae, Y.; Guo, X.; Benaarbia, A.; Neate, N.; Sun, W.

Authors

Y. Rae

X. Guo

A. Benaarbia

N. Neate

W. Sun



Abstract

© 2019 Elsevier B.V. In order to better understand the physical process of deformation and cyclic softening a 12% Cr martensitic stainless steel FV566 has been cyclically tested at high temperature in strain control. Increase in temperature was found to increase the cyclic life, softening rate and viscous stress magnitude. An increase in the dwell time led to the acceleration of the material degradation. The microstructure changes and dominating deformation mechanisms were investigated by means of scanning electron microscopy, electron backscatter diffraction and transmission electron microscopy. The results have revealed a gradual sub-grain coarsening, transformation of lath structure into fine equiaxed subgrains, and misorientation angle development in blocks and packets until material failure. The softening behaviour was attributed to the mutual annihilation of the dislocations and rearrangement of the residual dislocation in the low energy structures.

Citation

Rae, Y., Guo, X., Benaarbia, A., Neate, N., & Sun, W. (2020). On the microstructural evolution in 12% Cr turbine steel during low cycle fatigue at elevated temperature. Materials Science and Engineering: A, 773, https://doi.org/10.1016/j.msea.2019.138864

Journal Article Type Article
Acceptance Date Dec 20, 2019
Online Publication Date Dec 23, 2019
Publication Date Jan 31, 2020
Deposit Date Dec 29, 2019
Publicly Available Date Dec 24, 2020
Journal Materials Science and Engineering A
Print ISSN 0921-5093
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 773
Article Number 138864
DOI https://doi.org/10.1016/j.msea.2019.138864
Keywords Mechanical Engineering; General Materials Science; Mechanics of Materials; Condensed Matter Physics
Public URL https://nottingham-repository.worktribe.com/output/3645008
Publisher URL https://www.sciencedirect.com/science/article/pii/S0921509319316442
Additional Information This article is maintained by: Elsevier; Article Title: On the microstructural evolution in 12% Cr turbine steel during low cycle fatigue at elevated temperature; Journal Title: Materials Science and Engineering: A; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.msea.2019.138864; Content Type: article; Copyright: © 2019 Elsevier B.V. All rights reserved.