A comparison of microstructure and mechanical properties of low-alloy-medium-carbon steels after quench-hardening

ABBASI, Erfan, LUO, Quanshun and OWENS, Dave (2018). A comparison of microstructure and mechanical properties of low-alloy-medium-carbon steels after quench-hardening. Materials Science and Engineering: A, 725, 65-75.

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Link to published version:: https://doi.org/10.1016/j.msea.2018.04.012


The microstructural characteristics of three medium carbon steels, namely MnCrB, NiCrSi and NiCrMoV containing steels, have been investigated when the steels were hardened by quenching in water or oil from different austenitisation temperatures (i.e. 850, 900 and 950 °C). The microstructure was characterised using optical microscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy, and X-Ray diffraction technique, whereas the mechanical properties were measured by Vickers hardness testing, V-notched Charpy impact testing and tensile testing. The microscopy observations suggested a fully martensitic microstructure, whereas martensite was considerably finer in NiCrSi and NiCrMoV steels compared to MnCrB steel. Moreover, the NiCrSi and NiCrMoV steels showed significantly higher strengths and lower ductility than MnCrB steel. The results suggested that the small additions of alloying elements and different prior austenite grain sizes were mainly responsible for the observed microstructural and mechanical properties variations.

Item Type: Article
Research Institute, Centre or Group - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Materials Analysis and Research Services
Identification Number: https://doi.org/10.1016/j.msea.2018.04.012
Page Range: 65-75
Depositing User: Quanshun Luo
Date Deposited: 20 Apr 2018 10:34
Last Modified: 18 Mar 2021 05:49
URI: https://shura.shu.ac.uk/id/eprint/20915

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