Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters.

Autor: Yıldıran Avcu Y; Department of Mechanical Engineering, Kocaeli University, Kocaeli 41001, Turkey., Yetik O; Department of Mechanical Engineering, Kocaeli University, Kocaeli 41001, Turkey.; School of Materials, The University of Manchester, Manchester M13 9PL, UK., Guney M; Department of Civil and Environmental Engineering, Nazarbayev University, Nur-Sultan 010000, Kazakhstan.; The Environment and Resource Efficiency Cluster (EREC), Nazarbayev University, Nur-Sultan 010000, Kazakhstan., Iakovakis E; Department of Mechanical Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, UK., Sınmazçelik T; Department of Mechanical Engineering, Kocaeli University, Kocaeli 41001, Turkey., Avcu E; School of Materials, The University of Manchester, Manchester M13 9PL, UK.; Ford Otosan Ihsaniye Automotive Vocational School, Kocaeli University, Kocaeli 41650, Turkey.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2020 Sep 30; Vol. 13 (19). Date of Electronic Publication: 2020 Sep 30.
DOI: 10.3390/ma13194363
Abstrakt: Ti6Al4V alloy was shot peened by using stainless-steel shots with different sizes (0.09-0.14 mm (S10) and 0.7-1.0 mm (S60)) for two durations (5 and 15 min) using a custom-designed peening system. The shot size was the main parameter modifying the roughness (0.74 µm for S10 vs. 2.27 µm for S60), whereas a higher peening time slightly increased roughness. Hardness improved up to approximately 35% by peening with large shots, while peening time was insignificant in hardness improvement. However, longer peening duration with large shots led to an unwanted formation of micro-cracks and delamination on the peened surfaces. After dry sliding wear tests, the mass loss of peened samples (S60 for 15 min) was 25% higher than that of un-peened samples, while the coefficient of friction decreased by 12%. Plastically deformed regions and micro-scratches were observed on the worn surfaces, which corresponds to mostly adhesive and abrasive wear mechanisms. The present study sheds light on how surface, subsurface and tribological properties of Ti6Al4V vary with shot peening and peening parameters, which paves the way for the understanding of the mechanical, surface, and tribological behavior of shot peened Ti6Al4V used in both aerospace and biomedical applications.
Competing Interests: The authors declare no conflict of interest.
Databáze: MEDLINE
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