Comparative study between wear of uncoated and TiAlN-coated carbide tools in milling of Ti6Al4V
- 180 Downloads
Abstract
As is recognized widely, tool wear is a major problem in the machining of difficult-to-cut titanium alloys. Therefore, it is of significant interest and importance to understand and determine quantitatively and qualitatively tool wear evolution and the underlying wear mechanisms. The main aim of this paper is to investigate and analyse wear, wear mechanisms and surface and chip generation of uncoated and TiAlN-coated carbide tools in a dry milling of Ti6Al4V alloys. The quantitative flank wear and roughness were measured and recorded. Optical and scanning electron microscopy (SEM) observations of the tool cutting edge, machined surface and chips were conducted. The results show that the TiAlN-coated tool exhibits an approximately 44% longer tool life than the uncoated tool at a cutting distance of 16 m. A more regular progressive abrasion between the flank face of the tool and the workpiece is found to be the underlying wear mechanism. The TiAlN-coated tool generates a smooth machined surface with 31% lower roughness than the uncoated tool. As is expected, both tools generate serrated chips. However, the burnt chips with blue color are noticed for the uncoated tool as the cutting continues further. The results are shown to be consistent with observation of other researchers, and further imply that coated tools with appropriate combinations of cutting parameters would be able to increase the tool life in cutting of titanium alloys.
Keywords
Tool wear Titanium alloy Tungsten carbide tool Wear mechanism High speed machiningNotes
Acknowledgements
The authors like to thank Adelaide Microscopy Unit of University of Adelaide for their support in using SEM and EDX for observation of cutting tools and machined surfaces.
References
- 1.Arrazola PJ, Garay A, Iriarte LM et al (2009) Machinability of titanium alloys (Ti6Al4V and Ti555.3). J Mater Process Technol 209(5):2223–2230CrossRefGoogle Scholar
- 2.Niknam SA, Khettabi R, Songmene V (2014) Machinability and machining of titanium alloys: a review. In: Davim JP (ed) Machining of titanium alloys. Springer, Berlin, pp 1–30Google Scholar
- 3.Nouari M, Makich H (2014) On the physics of machining titanium alloys: interactions between cutting parameters, microstructure and tool wear. Metals 4(3):335–358CrossRefGoogle Scholar
- 4.Arsecularatne JA, Zhang LC, Montross C (2006) Wear and tool life of tungsten carbide, PCBN and PCD cutting tools. Int J Mach Tools Manuf 46(5):482–491CrossRefGoogle Scholar
- 5.Zareena AR, Veldhuis SC (2012) Tool wear mechanisms and tool life enhancement in ultra-precision machining of titanium. J Mater Process Technol 212(3):560–570CrossRefGoogle Scholar
- 6.Santhanam T, Tierney P, Hunt JL (1990) Properties and selection: nonferrous alloys and special-purpose materials, vol 2, 10th edn. Kennametal Inc, LatrobeGoogle Scholar
- 7.Egashira K, Hosono S, Takemoto S et al (2011) Fabrication and cutting performance of cemented tungsten carbide micro-cutting tools. Precis Eng 35(4):547–553CrossRefGoogle Scholar
- 8.Su HH, Liu P, Fu Y et al (2012) Tool life and surface integrity in high-speed milling of titanium alloy TA15 with PCD/PCBN tools. Chin J Aeronaut 25(5):784–790CrossRefGoogle Scholar
- 9.Li A, Zhao J, Wang D et al (2012) Failure mechanisms of a PCD tool in high-speed face milling of Ti-6Al-4V alloy. Int J Adv Manuf Technol 67(9–12):1959–1966Google Scholar
- 10.Jawaid A, Sharif S, Koksal S (2000) Evaluation of wear mechanisms of coated carbide tools when face milling titanium alloy. J Mater Process Technol 99(1–3):266–274CrossRefGoogle Scholar
- 11.Bhatt A, Attia H, Vargas R et al (2010) Wear mechanisms of WC coated and uncoated tools in finish turning of Inconel 718. Tribol Int 43(5–6):1113–1121CrossRefGoogle Scholar
- 12.Ghani J, Che HCH, Hamdan SH et al (2013) Failure mode analysis of carbide cutting tools used for machining titanium alloy. Ceram Int 39(4):4449–4456CrossRefGoogle Scholar
- 13.Hartung PD, Kramer BM, von Turkovich BF (1982) Tool wear in titanium machining. CIRP Ann Manuf Technol 31(1):75–80CrossRefGoogle Scholar
- 14.Ezugwu EO, Wang ZM (1997) Titanium alloys and their machinability—a review. J Mater Process Technol 68(3):262–274CrossRefGoogle Scholar
- 15.Ginting A, Nouari M (2006) Experimental and numerical studies on the performance of alloyed carbide tool in dry milling of aerospace material. Int J Mach Tools Manuf 46(7–8):758–768CrossRefGoogle Scholar
- 16.Deng JX, Li YS, Song WL (2008) Diffusion wear in dry cutting of Ti-6Al-4V with WC/Co carbide tools. Wear 265(11–12):1776–1783Google Scholar
- 17.Gerez JM, Sanchez-Carrilero M, Salguero J et al (2009) A SEM and EDS based study of the microstructural modifications of turning inserts in the dry machining of Ti6Al4V alloy. AIP Conf Proc 1181:567–574Google Scholar
- 18.Pramanik A, Islam MN, Basak A et al (2013) Machining and tool wear mechanisms during machining titanium alloys. Adv Mater Res 651:338–343CrossRefGoogle Scholar
- 19.Zhang S, Li JF, Sun J et al (2009) Tool wear and cutting forces variation in high-speed end-milling Ti-6Al-4V alloy. Int J Adv Manuf Technol 46(1–4):69–78Google Scholar
- 20.Astakhov VP, Davim JP (2008) Tools (geometry and material) and tool wear—Springer. In: machining: fundamentals and recent advances. Springer, Berlin, pp 25–57Google Scholar
- 21.Dhar NR, Islam S, Kamruzzaman M et al (2006) Wear behavior of uncoated carbide inserts under dry, wet and cryogenic cooling conditions in turning C-60 steel. J Braz Soc Mech Sci Eng 28(2):146–152CrossRefGoogle Scholar
- 22.Sharif S, Abd E, Sasahar H (2012) Machinability of titanium alloys in drilling. In: Amin AKMN (ed) Titanium alloys-towards achieving enhanced properties for diversified applications. InTech, OsakaGoogle Scholar
- 23.König W, Fritsch R, Kammermeier D (1991) Physically vapor deposited coatings on tools: performance and wear phenomena. In: metallurgical coatings and thin films. Elsevier, Oxford, pp 316–324Google Scholar
- 24.Zhang Y, Zhou Z, Wang J et al (2013) Diamond tool wear in precision turning of titanium alloy. Mater Manuf Process 28(10):1061–1064CrossRefGoogle Scholar
- 25.Odelros S (2012) Tool wear in titanium machinin. Dissertation, Uppasla University, UppaslaGoogle Scholar
- 26.Bai Q (2014) Interactions between wear mechanisms in a WC-Co/Ti-6Al-4V machining tribosystem. Dissertation, Texas A&M University, USAGoogle Scholar
- 27.Che-Haron CH, Jawaid A (2005) The effect of machining on surface integrity of titanium alloy Ti-6% Al-4% V. J Mater Process Technol 166(2):188–192CrossRefGoogle Scholar
- 28.Bermingham MJ, Palanisamy S, Dargusch MS (2012) Understanding the tool wear mechanism during thermally assisted machining Ti-6Al-4V. Int J Mach Tools Manuf 62:76–87CrossRefGoogle Scholar
- 29.Cotterell M, Byrne G (2008) Dynamics of chip formation during orthogonal cutting of titanium alloy Ti-6Al-4V. CIRP Ann Manuf Technol 57(1):93–96CrossRefGoogle Scholar
- 30.Li H, He G, Qin X et al (2014) Tool wear and hole quality investigation in dry helical milling of Ti-6Al-4V alloy. Int J Adv Manuf Technol 71(5–8):1511–1523CrossRefGoogle Scholar
- 31.Sutter G, List G (2013) Very high speed cutting of Ti-6Al-4V titanium alloy—change in morphology and mechanism of chip formation. Int J Mach Tools Manuf 66:37–43CrossRefGoogle Scholar
- 32.Gao C, Zhang L (2013) Effect of cutting conditions on the serrated chip formation in high-speed cutting. Mach Sci Technol 17(1):26–40CrossRefGoogle Scholar
- 33.Wang Z, Nakashima S, Larson M (2014) Energy efficient machining of titanium alloys by controlling cutting temperature and vibration. Procedia CIRP 17:523–528CrossRefGoogle Scholar