TAILORING SURFACE MORPHOLOGY AND TOPOGRAPHY OF SHOT-PEENED Ti6Al4V VIA GRIT BLASTING

OBLIKOVANJE POVRŠINSKE MORFOLOGIJE IN TOPOGRAFIJE ZLITINE Ti6Al4V S PESKANJEM PO PREDHODNEM OBSTRELJEVANJU NJENE POVRŠINE Z JEKLENIMI KROGLICAMI
Avcu Y.Y. Yetik O. Guney M. Sinmazcelik T. Avcu E.
2021 Institute of Metals Technology

Materiali in Tehnologije
2021 #55 Issue 5 625 - 628 pp.

The present study aims to reveal the effectiveness of grit blasting when modifying the surface properties of a Ti6Al4V alloy deteriorated due to shot peening. Ti6Al4V samples shot-peened under different parameters were grit-blasted (at impingement angles of 30° and 90°, blasting pressures of 1.5 bar and 3 bar). Grit blasting proved to be an effective way of tailoring the surface topography as the surface roughness of shot-peened samples (approx. 10 gm) declined to approx. 2 gm. The surface modifications mainly occurred via micro-ploughing and micro-cutting wear mechanisms, indicating that grit blasting at 30° was more favourable than at 90° for modifying the deteriorated surface properties after shot peening. Shot-peened samples behaved similarly to mirror-polished unpeened samples during grit blasting, showing that the modified surface and subsurface properties obtained via shot peening have an insignificant effect on grit blasting of the alloy. A quantitative analysis of the area covering the embedded particles on the surface of the alloy due to grit blasting showed that the area almost doubled when the alloy was grit blasted at 90° compared to 30°, highlighting an excessive amount of embedding, which would be critical when surface decontamination is important.

erosive wear , erosivna obraba , inženiring površin , peskanje , shot peening , surface engineering , titanium alloy , zlitina na osnovi titana

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Kocaeli University, Department of Mechanical Engineering, Kocaeli, 41001, Turkey
The University of Manchester, School of Materials, Manchester, M13 9PL, United Kingdom
Nazarbayev University, Department of Civil and Environmental Engineering, Nur-Sultan, 010000, Kazakhstan
Nazarbayev University, The Environment & Resource Efficiency Cluster (EREC), Nur-Sultan, 010000, Kazakhstan

Kocaeli University
The University of Manchester
Nazarbayev University
Nazarbayev University

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