Forthcoming and Online First Articles

International Journal of Abrasive Technology

International Journal of Abrasive Technology (IJAT)

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International Journal of Abrasive Technology (2 papers in press)

Regular Issues

  • An experimental study on global contact stiffness of sandy particle layers under high loads in three body contact   Order a copy of this article
    by The Y. Doan  
    Abstract: In this work, the stress-strain behaviour of particle layers, namely, global contact stiffness is investigated by a series of uniaxial compressing tests. In our experiment, one up to three layers of quartz sand grade HB 34 are pressed between a block of steel and a rotating steel disk with the applied load varying from 0.03 kN up to 20 kN. The stiffness of abrasive layers depends on different parameters such as the applied loads, the thickness of the layers and the loading-unloading process. The dependency of the contact stiffness on normal loads and on different compression test conditions is studied. Based on the global stiffness of the particle layer, the local contact pressure in the contact zone can be estimated. We have built a uniaxial spindle tester and carried out various experiments. Accordingly, some mathematical expressions of contact stiffness in terms of applied loads in loading, unloading process were derived by regression algorithms.
    Keywords: contact stiffness; three-body abrasive wear; mathematical modelling; experimental investigation.
    DOI: 10.1504/IJAT.2024.10061429
     
  • Development of burnishing process using free-ball tools for surface modification and improvement of corrosion resistance of inner wall of water channels of die-casting moulds   Order a copy of this article
    by Masato Okada, Reyu Yamamoto, Yuji Kobayasi, Yuta Saito 
    Abstract: A burnishing process that use free-ball tools on the inner surface of a drilled hole was developed to prevent surface cracking and corrosion in the cooling water channels of die-casting moulds. In the developed burnishing process, a pressure bar with a hammering mechanism is used to apply impact forces to multiple hard balls placed in the target hole. The resulting compressive forced achieve surface modification at multiple contact points between the free-ball tools and inner surface of the target hole. These contact points are changed by stirring the ball tools, thereby applying a burnishing effect to the entire inner surface of the hole. Moreover, zinc powder is interposed between the free-ball tools and target surface, where it adheres to the target surface and improves the corrosion resistance.
    Keywords: surface modification; corrosion-resistance treatment; burnishing process; free-ball tools; surface profile; hole inner surface; hardened die steel; water channels; die-casting mould.
    DOI: 10.1504/IJAT.2024.10062800