Wear property and wear mechanisms of high-manganese austenitic Hadfield steel in dry reciprocal sliding

LUO, Quanshun and ZHU, Jingzhi (2022). Wear property and wear mechanisms of high-manganese austenitic Hadfield steel in dry reciprocal sliding. Lubricants, 10 (3).

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Official URL: https://www.mdpi.com/2075-4442/10/3/37
Open Access URL: https://www.mdpi.com/2075-4442/10/3/37/pdf (Published version)
Link to published version:: https://doi.org/10.3390/lubricants10030037
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    Abstract

    This paper reports the sliding wear properties and wear mechanisms of Hadfield high-Mn austenitic steel in a dry-sliding reciprocal tribotest against a WC counterpart. The associated wear mechanisms were studied through extensive characterisation of the obtained worn surface using analytical SEM, TEM, XRD and micro-hardness test. The tribotest revealed a coefficient of wear in the scale of 10−14 m3·N−1·m−1 and a coefficient of friction of 0.5–0.6. The steel encountered severe plastic deformation beneath the worn surface leading to a gradient of hardness profile, including the extreme hardening of the worn surface up to HV0.1 8.2 GPa. Despite the severe de-formation and significant strain hardening, the steel still retained its austenitic structure without any detectable martensite. The combined surface and cross-sectional microscopic observations and extensive analysis of XRD peak breadth revealed the formation of nano-heterogeneous microstructure including nano-laminate, nanotwins and nanocrystalline beneath the worn sur-face. Spalling wear was found as the predominant wear mechanism. The spalling wear was caused by the embrittlement of the extremely hardened and nanocrystallised worn surface. Tribo-oxidation was also observed in the resultant wear debris.

    Item Type: Article
    Identification Number: https://doi.org/10.3390/lubricants10030037
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 07 Mar 2022 12:47
    Last Modified: 07 Mar 2022 13:00
    URI: https://shura.shu.ac.uk/id/eprint/29850

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