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Surface drag analysis after Ti-6Al-4V orthogonal cutting using grid distortion

Type
Communications avec actes
Author
SELA, Andres
366133 Mondragon Unibertsitatea
ORTIZ-DE-ZARATE, Gorka
366133 Mondragon Unibertsitatea
SOLER, Daniel
366133 Mondragon Unibertsitatea
ARISTIMUÑO, Patxi
366133 Mondragon Unibertsitatea
SORIANO, Denis
366133 Mondragon Unibertsitatea
GERMAIN, Guénaël
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
DUCOBU, François
160918 Université de Mons [UMons]
ARRAZOLA, Pedro José
366133 Mondragon Unibertsitatea

URI
http://hdl.handle.net/10985/19440
DOI
10.1016/j.procir.2020.02.040
Date
2020

Abstract

Surface integrity directly affects the mechanical behavior of the workpiece, which is especially relevant on fatigue behavior. To characterize the quality of the machined surface, aspects such as material damage, roughness or residual stress are considered. Measurement of the material damage of the surface is characterized in some cases as surface drag, depth of the affected machining zone, a phenomenon which takes place due to plastic strain in the surface layer caused by machining stress which could have an influence on residual stress. Surface drag measurement done with optical microscopes has relevant uncertainty. In this paper, a methodology to measure the surface drag with lower uncertainty is proposed. The method consists of measuring the deformation of a grid as a result of the machining process. The grid was created with micromilling. The method was applied to analyze the effect of feed on the surface integrity after orthogonal cutting of Ti-6Al-4V. The depth of the affected layer was measured using a 3D optical measuring device (Alicona Infinite Focus IFG4) and compared with numerical simulations and a good agreement was achieved. In comparison with optical microscope results, it can be concluded that traditional method underestimates surface drag

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