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  • 1.
    Alvi, Sajid
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Luleå, Sweden.
    Neikter, Magnus
    University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. Luleå University of Technology, Department of Engineering Sciences and Mathematics, Luleå, Sweden.
    Antti, Marta -Lena
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Luleå, Sweden.
    Akhtar, Farid
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Luleå, Sweden.
    Tribological performance of Ti6Al4V at elevated temperatures fabricated by electron beam powder bed fusion2021In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 153, article id 106658Article in journal (Refereed)
    Abstract [en]

    Electron beam powder bed fusion (EBPBF) is a beneficial processing route to fabricate Ti6Al4V alloy for aerospace applications due to its relatively low lead time and the possibility of topology optimization. The dry sliding wear behavior of EBPBF-Ti6Al4V against steel- and alumina-counterballs from room temperature (RT) to 500 °C was investigated to evaluate the influence of EBPBF processing and microstructure on the wear properties for broadening the application criteria of this lightweight alloy. The wear tests revealed that the wear rate decreased with increasing temperature due to formation of stable oxide glaze layer. This study reveals elevated temperature sliding wear behavior, wear mechanisms and microstructural changes below the wear track of EBPBF Ti6Al4V alloy against steel and alumina counterbodies. 

  • 2. Rajasekaran, B.
    et al.
    Raman, S. G. S.
    Joshi, S. V.
    Sundararajan, G.
    Influence of detonation gun sprayed alumina coating on AA 6063 samples under cyclic loading with and without fretting2008In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 41, no 4, p. 315-322Article in journal (Refereed)
    Abstract [en]

    The influence of detonation gun sprayed alumina coating on Al-Mg-Si alloy (AA 6063) test samples subjected to cyclic loading with and without fretting was studied in the present work. Coated samples were grounded to have coatings of two different thickness values, 40 and 100 mu m. Both 40- and 100-mu m-thick coated specimens experienced almost the same but slightly higher friction force compared with uncoated samples. Under plain fatigue loading, 100 pm coated specimens exhibited inferior lives due to the presence of lower surface compressive residual stress compared with uncoated and 40-mu m-thick coated samples. Under fretting fatigue loading, uncoated specimens exhibited inferior lives compared with coated samples owing to the very low hardness of the uncoated specimens (80 against 1020 HV0.2). The reason for the superior fretting fatigue lives of 40-mu m-thick coated samples compared with 100-mu m-thick coated samples was the presence of relatively higher surface compressive residual stress in 40-pm-thick coated specimens. (c) 2007 Elsevier Ltd. All rights reserved.

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