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Metal Science and Heat Treatment

09.02.2023

Effect of Interrupted Quenching on the Microstructure, Mechanical Properties and Dislocation Density of Steel AISI 4340

verfasst von: Burak Nalcaci, Omer Cihad Aydin, Salih Yilmaz, Volkan Kilicli

Erschienen in: Metal Science and Heat Treatment

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Abstract

The effect of interrupted quenching on the microstructure, mechanical properties and dislocation density of steel AISI 4340 is studied. Metallographic and x-ray diffraction analyses are performed. Tensile tests are conducted. The Vickers hardness is measured. The dislocation density is calculated. The effect of the duration of the hold at 300°C during the interrupted quenching on the structure and properties of the steel is considered. It is shown that a duplex structure represented chiefly by martensite and bainite forms after interrupted quenching by all the variants studied. The duplex structure affects positively the properties of steel AISI 4340. The dislocation density, the ultimate strength and the hardness are the highest in the steel containing 34.7% bainite, 55% martensite and 10.3% retained austenite after the interrupted quenching at 300°C with a 5-min hold.

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Metadaten
Titel
Effect of Interrupted Quenching on the Microstructure, Mechanical Properties and Dislocation Density of Steel AISI 4340
verfasst von
Burak Nalcaci
Omer Cihad Aydin
Salih Yilmaz
Volkan Kilicli
Publikationsdatum
09.02.2023
Verlag
Springer US
Erschienen in
Metal Science and Heat Treatment
Print ISSN: 0026-0673
Elektronische ISSN: 1573-8973
DOI
https://doi.org/10.1007/s11041-023-00843-z

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