Microstructure and Fatigue of Ultrafine‐Grained Ferritic/Martensitic Steel

Marina Nikitina; Rinat Islamgaliev; Artur Ganeev; Vil Sitdikov

doi:10.1002/adem.202000034

journal article·2020-10

Microstructure and Fatigue of Ultrafine‐Grained Ferritic/Martensitic Steel

Marina Nikitina, Rinat Islamgaliev, Artur Ganeev, Vil Sitdikov

Advanced Engineering Materials· Volume 22· Issue 10

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Source abstract

Abstract

The impact of equal‐channel angular pressing in combination with additional heat treatment on microstructure and fatigue of ferritic/martensitic steel is investigated. It is shown that the formation of both the ultrafine‐grained (UFG) structure with an average grain size of about 0.8 μm and the enhanced share of boundaries with the coincidence site lattice (CSL) relationships (the CSL boundaries) leads to an increase in the fatigue endurance limit of more than 50% compared with samples after tempering. Dynamic strain aging is found in the fracture zone of the UFG of samples after fatigue tests. The influence of structural parameters on the fatigue endurance limit of the UFG samples is discussed.

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Research context

Metals & alloys Materials processing

OpenAlex topics: Microstructure and mechanical properties · Microstructure and Mechanical Properties of Steels · Metal Alloys Wear and Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Physics of Advanced Materials Ufa State Aviation Technical University K. Marx str. 12 Ufa 450000 Russia

Funding

Russian Science Foundation

References (14)

Show source-provided references

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