Characterization of cyclic behavior, deformation mechanisms, and microstructural evolution of MarBN steels under high temperature conditions

Benaarbia, Adil; Xu, X.; Sun, W.; Becker, Adib; Osgerby, Steve

Abstract

In this paper, the low cycle fatigue behaviour of MarBN steels at elevated temperatures is discussed. Four cyclic loading waveforms were applied to investigate both the mechanical and microstructural features. The mechanical results exhibit continuous cyclic softening and decelerated stress relaxation, recoverable viscoelasticity at both short and long time scales and irrecoverable viscoplastic mechanisms. Detailed microstructural characterisation was also conducted to investigate the rupture behaviour of the investigated steel. The microstructural findings indicate typical transgranular and ductile fracture behaviour, extensive sub-grain formation and structural refinement as well as significant decrease in hardness close to the fracture surface.

Citation

Benaarbia, A., Xu, X., Sun, W., Becker, A., & Osgerby, S. (2020). Characterization of cyclic behavior, deformation mechanisms, and microstructural evolution of MarBN steels under high temperature conditions. International Journal of Fatigue, 131, 105270. https://doi.org/10.1016/j.ijfatigue.2019.105270

• Journal Article Type: Article
• Acceptance Date: Sep 12, 2019
• Online Publication Date: Sep 23, 2019
• Publication Date: 2020-02
• Deposit Date: Sep 12, 2019
• Publicly Available Date: Sep 24, 2020
• Journal: International Journal of Fatigue
• Print ISSN: 0142-1123
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 131
• Article Number: 105270
• Pages: 105270
• DOI: https://doi.org/10.1016/j.ijfatigue.2019.105270
• Keywords: Mechanical Engineering; Modelling and Simulation; Industrial and Manufacturing Engineering; General Materials Science; Mechanics of Materials
• Public URL: https://nottingham-repository.worktribe.com/output/2609015
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0142112319303743