Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-26T20:13:03.633Z Has data issue: false hasContentIssue false
  • English
  • Français

Wear of WC-Co inserts in dry high speed machining ofmicron-sized particle aeronautical grade near β titanium alloy

Published online by Cambridge University Press:  28 August 2014

H. Abdel-Aal  and
M. El Mansori
H. Abdel-Aal*
Affiliation:
Laboratoire de Mécanique et Procédés de Fabrication (LMPF), ENSAM CER Châlons-en-Champagne, Rue Saint Dominique, BP 508, 51006 Châlons-en-Champagne, France Ecpi University, 1001 Keys Drive, Greenville, SC 29651, USA
M. El Mansori
Affiliation:
École Nationale Supérieure d’Arts et Métiers, 2 cours des Arts et Métiers, 13617 Aix en Provence Cedex 1, France
*
a Corresponding author:[email protected]
Get access

Abstract

Current demands of higher damage-tolerance in the Aerospace industry resulted inresurging interest in β, or near β, titanium alloys. The combination of attractiveproperties of this class of alloys also led to the consideration of beta alloys forcastings. Such alloys, however, are more difficult to cut than α-β titanium alloys due totheir limited ability to work harden and the effect of β-stabilizers on ductility.These factors affect failure modes and active wear mechanisms of cutting inserts. Thispaper investigates some of the wear modes exhibited by WC-Co inserts when end milling theαnear-βalloy Ti-x.In addition to being of near-β composition, this alloy is characterized by a finesized microstructure (range of 1−5 μm). The study focuses on SEM and EDS observations ofthe wear patterns exhibited by two groups of inserts. The first is uncoated WC-Co, whereasthe second is coated with multi layers of TiAlN. The results of this post-mortem study arecompared to wear patterns, observed under identical conditions, while milling theα-β alloy Ti6Al4V. Results show that inserts used inmachining the Ti-x alloy exhibit wear modes that contrast thoseexhibited when machining Ti64. The paper discusses factors leading to such occurrences andstudies the influence of the alloy microstructure on tool effectiveness and failure modes.

Keywords

Near Titanium alloysWCCo toolstitanium machiningwear of carbide inserts
Type
Research Article
Information
Mechanics & Industry , Volume 15 , Issue 5 , 2014 , pp. 413 - 426
Copyright
© AFM, EDP Sciences 2014

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Boyer, R.R., R.D. Briggs, J. Mater. Eng. Performance 14 (2005) 681–685 CrossRefGoogle Scholar
J. Panter, A. Dallz, K.-H. Rendigs, N. Hellard, W. Gerhard, Influence of thermo-mechanical treatments on microstructure and mechanical properties of near beta titanium alloy VST 55531, Annual Meeting of the Materials Society, 2005
Semiatin, S.L., Seetharaman, V., Ghosh, A.K., Plastic flow, microstructure evolution, and defect formation during primary hot working of titanium and titanium aluminide alloys with lamellar colony microstructures (1999), Philos. Trans. R. Soc. A: Math. Phys. Eng. Sci. 357 (1756) 1487−1512 CrossRefGoogle Scholar
Jackson, M., Dashwood, R., Christodoulou, L., Flower, H., The microstructural evolution of near beta alloy Ti-10V-2Fe-3Al during subtransus forging, Metall. Mater. Trans. A: Phys. Metall. Mater. Sci. 36 (2005) 1317–1327 CrossRefGoogle Scholar
Jackson, M., Application of novel technique to examine thermomechanical processing of near beta alloy Ti-10V-2Fe-3Al, Mater. Sci. Technol. 16 (2000) 1437−1444 CrossRefGoogle Scholar
Balasubrahmanyam, V.V., Prasad, Y.V.R.K., Deformation behaviour of beta titanium alloy Ti-10V-4.5Fe-1.5Al in hot upset forging, Mater. Sci. Eng. A 336 (2002) 150–158 CrossRefGoogle Scholar
Jones, N.G., Dashwood, R.J., Dye, D., Jackson, M., Mater. Sci. Eng. A 490 (2008) 369–377 CrossRef
Hughes, J.I., Sharman, A.R.C., Ridgway, K., The effect of cutting tool material and edge geometry on tool life and workpiece surface integrity, Proc. Instit. Mech. Eng. B: J. Eng. Manufact. 220 (2006) 93–107 CrossRefGoogle Scholar
Ezugwu, E.O., Wang, Z.M., Titanium alloys and their machinability – A review, J. Mater. Proc. Technol. 68 (1997) 262–274 CrossRefGoogle Scholar
Ribeiro, M.V., Moreira, M.R.V., Ferreira, J.R., Optimization of titanium alloy (6Al-4V) machining, J. Mater. Proc. Technol. 143-144 (2003) 458–463 CrossRefGoogle Scholar
M. Lee, Proc. Symp. Advances in processing Methods for Titanium, Louisville Kentucky, AIME, 1981, pp. 275–287
Wanigarathne, P.C., Kardekar, A.D., Dillon, O.W., Poulachon, G., Jawahir, I.S., Progressive tool-wear in machining with coated grooved tools and its correlation with cutting temperature, Wear 259 (2005) 1215–1224 CrossRefGoogle Scholar
Y.S. Touloukian, Thermophysical Properties of Matter – Metallic Elements and Alloys, John Wiley & Sons Ltd, NY, 1971
Abdel-Aal, H.A., Nouari, M., El Mansori, M., Influence of thermal conductivity on wear when machining titanium alloys, Trib. Int. 42 (2009) 359–372 CrossRefGoogle Scholar
Abdel-Aal, H.A., Nouari, M., El Mansori, M., Tribo-energetic correlation of tool thermal properties to wear of WC-Co inserts in high speed dry machining of aeronautical grade titanium alloys, Wear 266 (2009) 432–444 CrossRefGoogle Scholar
N Wiser, Electrical resistivity of metals, in Encyclopedia of Physical Science and Technology, Academic Press, 1992, Vol. 5, p. 445
Abdel-Aal, H.A., El Mansori, M., Influence of high pressure thermal behavior on friction-induced material transfer during dry machining of titanium, proc 14th Conference of (European Scientific Association for Material Forming) ESAFORM, Queen’s University Belfast, Northern Ireland, April 27th to 29th, 2011, AIP Conf. Proc. 1353 (2011) 1806–1811 CrossRefGoogle Scholar
H.A. Abdel-Aal, M. El Mansori, Dry reciprocating sliding of WC-Co and commercially pure tungsten on titanium under the influence of biasing dc-current, 13th International Conference on Metrology and Properties of Engineering Surfaces 2011 METPROP, National Physical Laboratory 12–14 April 2011, pp. 126–130
Friedman, M.Y., Lenz, E., The effect of thermal conductivity of tool material on cutting forces and crater wear rate, Wear 25 (1973) 39–44 CrossRefGoogle Scholar
Lenz, and Friedman, M.Y., Investigation of the tool-chip contact length in metal cutting, Int. J. Mach. Tool Des. Res. 10 (1970) 401–416 Google Scholar
Jones, N.G., Dashwood, R.J., Dye, D., M. Jackson, Mater. Sci. Eng. A 490 (2008) 369–377 CrossRefGoogle Scholar
Balog, P.S., Secco, R.A., High pressure and temperature behaviour of electrical resistivity of hcp metals Ti, Zr and Gd, J. Phys.: Condens. Matter 11 (1999) 1273 Google Scholar