Kinematic fields measurement during Ti-6Al-4V chip formation using new high-speed imaging system
Article dans une revue avec comité de lecture
Author
Date
2023-01Journal
The International Journal of Advanced Manufacturing TechnologyAbstract
Orthogonal cutting on Ti-6Al-4V produces segmented chips which results from localized deformation within the Primary Shear Zone (PSZ). For in situ visualization of the material flow during Ti-6Al-4V chip formation, a new high-speed optical system is proposed. Difficulties arise from the submillimetric size of the cutting zone. Therefore, a dedicated optical system with coaxial illumination is designed allowing for local scale analysis of chip formation. In this paper, the cutting forces were measured highlighting the unsteady nature of Ti-6Al-4V chip segmentation. For kinematic fields measurement, a novel method of Digital Image Correlation (DIC) technique is applied on the recorded images from the cutting zone. It allows for the identification of the localized deformation bands. Then, the level of the cumulative strain fields reached in the PSZ was presented and analyzed. The effect of the rake angle on the strain fields was studied. Using a 0∘ rake angle, the segment chip was found to be more subjected to deformation than in the case using 15∘. Accuracy of the measured strain fields was discussed function of the main source of errors. In addition, the chip morphology and microstructure were investigated with a scanning electron microscopy (SEM). It shows crack opening along the PSZ and high material failure near the tool-chip interface which explains the difficulties of DIC application in the context of kinematic fields measurement during orthogonal cutting. Finally, correlation between the measured strain fields and the mean value of the chip segment width was made.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Communication avec acteThe determination of all the 6 mechanical actions of cutting processes is very interesting for modeling of milling, turning and drilling in order to optimize the geometric parameters, kinematic, improve the quality of the ...
-
Cutting Forces Parametric Model for the Dry High Speed Contour Milling of Aerospace Aluminium Alloys Article dans une revue avec comité de lectureSALGUERO, Jorge; BATISTA, Moises; CALAMAZ, Madalina; GIROT, Franck; MARCOS, Mariano (Elsevier, 2013)Cutting forces is one of the most important outputs in material removal machining processes. Their values depend on a large number of parameters, such as the cutting tool material and geometry, the workpiece material or ...
-
Article dans une revue avec comité de lectureIn this study, the commercial finite element software FORGE2005, able to solve complex thermo-mechanical problems is used to model titanium alloy dry machining. One of the main machining characteristics of titanium alloys ...
-
Article dans une revue avec comité de lectureCALAMAZ, Madalina; LIMIDO, Jérôme; NOUARI, Mohammed; ESPINOSA, Christine; COUPARD, Dominique; SALAUN, Michel; GIROT, Franck; CHIERAGATTI, Rémy (Elsevier, 2009)The aim of this study is to improve the general understanding of tungsten carbide (WC–Co) tool wear under dry machining of the hard-to-cut titanium alloy Ti6Al4V. The chosen approach includes experimental and numerical ...
-
Article dans une revue avec comité de lectureA new material constitutive law is implemented in a 2D finite element model to analyse the chip formation and shear localisation when machining titanium alloys. The numerical simulations use a commercial finite element ...