Article: Application of GOV (flow peening) process to improve surface quality of Ti-6Al-4V of aerospace material Journal: International Journal of Surface Science and Engineering (IJSURFSE) 2023 Vol.17 No.3 pp.195 - 230 Abstract: Ti-6Al-4V is a difficult-to-cut material with wide applications due to its superior mechanical features. Non-traditional surface treatment methods namely abrasive flow machining and shot peening are applied to obtain desired surface quality. GOV (flow peening) process having advantages of surface quality and strength improvement (compressive residual stress generation) of AFM and shot peening respectively was developed. In this paper, the effects of the GOV process parameters (number of cycles, steel ball size, and media ratio) on the material surfaces were investigated to evaluate surface roughness (Ra), material removal amount and white layer thickness. The surface roughness, Ra value was decreased from 2.17 µm to 0.80 µm. In addition, 4.4 mg of material corresponds to total amount of white layer was removed (verified by SEM images). GOV process can be used to improve surface quality by decreasing surface roughness and removing white layer without any excess chip removal. Inderscience Publishers - linking academia, business and industry through research

Title: Application of GOV (flow peening) process to improve surface quality of Ti-6Al-4V of aerospace material

Authors: Murat Kalak; Burak Sahin; Ibrahim Göv; Abdurrahman Dogan; Kursad Göv

Addresses: Aerospace Engineering Department, Faculty of Engineering and Architectural, Erzurum Technical University, 25050 Erzurum, Turkey ' Aerospace Engineering Department, Faculty of Aeronautics and Aerospace, Gaziantep University, 27310 Gaziantep, Turkey ' Aerospace Engineering Department, Faculty of Aeronautics and Aerospace, Gaziantep University, 27310 Gaziantep, Turkey ' Vocational School of Technical Sciences, Machinery and Metal Technology, Gaziantep Islam Science and Technology University, Gaziantep, Turkey ' Aerospace Engineering Department, Faculty of Aeronautics and Aerospace, Gaziantep University, 27310 Gaziantep, Turkey

Abstract: Ti-6Al-4V is a difficult-to-cut material with wide applications due to its superior mechanical features. Non-traditional surface treatment methods namely abrasive flow machining and shot peening are applied to obtain desired surface quality. GOV (flow peening) process having advantages of surface quality and strength improvement (compressive residual stress generation) of AFM and shot peening respectively was developed. In this paper, the effects of the GOV process parameters (number of cycles, steel ball size, and media ratio) on the material surfaces were investigated to evaluate surface roughness (R_a), material removal amount and white layer thickness. The surface roughness, R_a value was decreased from 2.17 µm to 0.80 µm. In addition, 4.4 mg of material corresponds to total amount of white layer was removed (verified by SEM images). GOV process can be used to improve surface quality by decreasing surface roughness and removing white layer without any excess chip removal.

Keywords: flow peening process; GOV; surface finishing; abrasive flow machining; aerospace materials; Ti-6Al-4V; white layer.

DOI: 10.1504/IJSURFSE.2023.134784

International Journal of Surface Science and Engineering, 2023 Vol.17 No.3, pp.195 - 230

Received: 01 Dec 2022
Accepted: 16 Jan 2023
Published online: 10 Nov 2023 *

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Title: Application of GOV (flow peening) process to improve surface quality of Ti-6Al-4V of aerospace material

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