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Influence of process parameters of ultrasonic shot peening on surface roughness and hydrophilicity of pure titanium

Zhu, Lihua et al.

Surface & coatings technology. Volume 317 (2017); pp 38-53 -- Elsevier

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  • Title:
    Influence of process parameters of ultrasonic shot peening on surface roughness and hydrophilicity of pure titanium
  • Author: Zhu, Lihua;
    Guan, Yanjin;
    Wang, Yanjie;
    Xie, Zhendong;
    Lin, Jun;
    Zhai, Jiqiang
  • Found In: Surface & coatings technology. Volume 317 (2017); pp 38-53
  • Journal Title: Surface & coatings technology
  • Subjects: Coating processes--Periodicals; Coatings--Periodicals; Surfaces (Technology)--Periodicals; Ultrasonic shot peening--Pure titanium--Process parameters--Surface roughness--Surface hydrophilicity; Dewey: 671.73
  • Rights: Licensed
  • Publication Details: Elsevier
  • Abstract: Abstract Ultrasonic shot peening (USP) can be employed to realize surface nanocrystallization and cause the changes of surface roughness and hydrophilicity at the same time, which may help improving the surface biological properties of pure titanium. In this paper, three-dimensional surface topography image, surface roughness and static contact angle of pure titanium treated by USP with different process parameters were obtained by non-contact optical surface profilometer and contact angle meter. Based on the experimental results, the influence rules and mechanism of process parameters, including peening duration, shot diameter, sonotrode amplitude and peening distance, on surface roughness and hydrophilicity of peened pure titanium were studied and the relation between surface roughness and hardness was also analyzed. After that, two relationship expressions were identified: one was between the surface roughness and surface hardness of pure titanium treated by USP while the other one was between the surface roughness and the process parameters with a correlation coefficient equal to 0.9804. According to the Wenzel model, the changes of the roughness factor r and the Young angle θ of pure titanium with different process parameters were calculated, then the influence of the surface roughness and the Young angle θ on the hydrophilicity of pure titanium were also discussed. Highlights Ultrasonic shot peening (USP) caused surface roughness and hydrophilicity changes. Influence of process parameters on surface roughness and hydrophilicity was studied. Higher surface roughness represents larger surface hardness after USP and vice versa. Two analytical models were established to predict the surface roughness of pure Ti. Changes of Young angle were the main reason that caused hydrophilicity changes.
  • Identifier: System Number: ETOCvdc_100045960180.0x000001; Journal ISSN: 0257-8972; doi/10.1016/j.surfcoat.2017.03.044
  • Publication Date: 2017
  • Physical Description: Electronic
  • Shelfmark(s): 8547.720000
  • UIN: ETOCvdc_100045960180.0x000001

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