University of Oulu

Oskari Haiko, Vahid Javaheri, Kati Valtonen, Antti Kaijalainen, Jaakko Hannula, Jukka Kömi, Effect of prior austenite grain size on the abrasive wear resistance of ultra-high strength martensitic steels, Wear, Volumes 454–455, 2020, 203336, ISSN 0043-1648, https://doi.org/10.1016/j.wear.2020.203336

Effect of prior austenite grain size on the abrasive wear resistance of ultra-high strength martensitic steels

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Author: Haiko, Oskari1; Javaheri, Vahid1; Valtonen, Kati2;
Organizations: 1Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, Finland
2Tampere Wear Center, Materials Science and Environmental Engineering, Tampere University, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2020062645904
Language: English
Published: Elsevier, 2020
Publish Date: 2022-05-16
Description:

Abstract

Prior austenite grain size has a marked effect on the hardenability, strength, and impact toughness properties of steels. This study was conducted in order to understand the effect of prior austenite grain size and morphology on the mechanical properties and abrasive wear performance of an ultra-high strength steel. A commercial quenched 500 HB grade wear-resistant steel was selected for the study: the steel was austenitized at two different temperatures and compared to the original, as-received quenched condition. The resulting mean prior austenite grain size was ranging from 14 μm to 34 μm. The decrease in grain size improved the low-temperature impact toughness properties. A high stress abrasive wear testing method with natural granite abrasives was utilized for the evaluation of abrasive wear resistance. The results suggest that decreasing the prior austenite grain size improves the abrasive wear resistance with similar hardness level martensitic steels. In addition, high-resolution electron backscatter diffraction measurements revealed formation of ultra-fine grain structures in the severely deformed regions of the wear surfaces.

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Series: Wear. An international journal on the science and technology of friction, lubrication and wear
ISSN: 0043-1648
ISSN-E: 1873-2577
ISSN-L: 0043-1648
Volume: 454–455
Article number: 203336
DOI: 10.1016/j.wear.2020.203336
OADOI: https://oadoi.org/10.1016/j.wear.2020.203336
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: This research has been done within the program Steel Ecosystem for Focused Applications (StEFA). We gratefully acknowledge financial support from Business Finland and the companies participating in the program. The corresponding author would also like to express his gratitude for the support provided by the University of Oulu Graduate School through the Advanced Materials Doctoral Program (ADMA-DP). Jenny and Antti Wihuri Foundation, Tauno Tönning Foundation, and Walter Ahlström Foundation are also acknowledged for their financial support to the corresponding author.
Copyright information: © 2020 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/