Effect of fracture toughness on impact-abrasion wear

Appa Rao Chintha, Veli-Tapani Kuokkala, Kati Valtonen, H.K.D.H. Bhadeshia

    Research output: Other conference contributionAbstractScientific

    Abstract

    There is a trend towards the development of harder steels for abrasion wear applications. The hardness is achieved by martensitic transformation. Increasing carbon concentration and other substitutional solutes may also help. Hardness certainly helps to improve the wear properties, but it is known in the context of lifting and excavation equipment that other properties such as toughness may also play a role. In any event, it always is necessary to optimise a basket of properties rather than a single parameter because the manufacture of a component requires a combination of performance criteria.
    In this context, the role of fracture toughness in increasing the wear resistance is studied in impact-abrasion conditions. Steel with high hardness but poor fracture toughness is compared to the one with very high fracture toughness but relatively low hardness. Wear resistance of the steels was studied using an impact abrasion test. This is a particularly severe test, in which samples are subjected to both impact as well as abrasion. The tested samples were characterised and assessed for the wear mechanisms. The initial assessments have ledto some impressive new knowledge about the mechanism of impact abrasion.
    Original languageEnglish
    Number of pages1
    Publication statusPublished - 2018
    EventAsia Steel 2018 - Hotel Mayfair Bhubaneswar, Odisha, India
    Duration: 6 Feb 20189 Feb 2018

    Conference

    ConferenceAsia Steel 2018
    Country/TerritoryIndia
    CityOdisha
    Period6/02/189/02/18

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