Investigation of recast and crack formation in laser trepanning drilling of CMSX-4 angled holes
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This paper presents an experimental investigation on the influences of laser trepanning drilling process parameters on the recast layer thickness and surface crack formation in CMSX-4 nickel-based superalloy angled holes. The effects of peak power, pulse frequency and the trepanning speed as input parameters were investigated in details by varying the laser drilling conditions using Taguchi orthogonal array-based design of experiment approach. Analysis of variance identifies the significant parameters affecting the output responses. It is found that the output responses are affected mainly by the peak power and trepanning speed. The experimental results reveal that the recast layer thickness increases with the increase of peak power and trepanning speed whereas the crack number density decreases with the increase of peak power only. Pulse frequency has no significant effect on both output responses within the range of values investigated. The knowledge gained in this parametric study could be used to improve the metallurgical characteristics of laser-drilled nickel-based acute angled holes.
KeywordsLaser trepanning drilling CMSX-4 Recast layer Surface cracks
The authors are thankful to the Engineering and Physical Science Research Council for financial support of the research work (grant number EP/I033246/1) and Rolls-Royce Plc for the technical support and useful discussions. The laser drilling facilities provided by Manufacturing Technology Centre (MTC), Ansty, are gratefully acknowledged.
- 16.van Dijk MH (1992) Drilling of aero-engine components: experiences from the shop floor. In: Belforte D, Leviit M (eds) The Industrial Laser Handbook. Springer, pp 113–118. https://doi.org/10.1007/978-1-4612-2882-0_12
- 24.Horn A, Weichenhain R, Albrecht S, Kreutz EW, Michel J, Niessen M, Kostrykin V, Schulz W, Etzkorn A, Bobzin K, Lugscheider E (2000) Microholes in zirconia coated Ni-superalloys for transpiration cooling of turbine blades. Proc SPIE Int Soc Opt Eng 4065:218–226Google Scholar
- 25.Grafton-Reed C (2008) Brief insight into Rolls-Royce laser manufacturing technologies. Ind Oppor laser micro nano Process - AILU Technol Work:1–9Google Scholar
- 27.Lugscheider E, Bobzin K, Maes M, Lackner K, Poprawe R, Kreutz E, Willach J (2005) Laser drilled microholes in zirconia coated surfaces using two variants to implement the effusion cooling of first stage turbine blades. Adv Eng Mater 7(3):145–152. https://doi.org/10.1002/adem.200400148 CrossRefGoogle Scholar
- 30.Wang K, Duan W, Mei X, Wang W (2012) Technology to drill micro-holes without recast layer by laser on nickel-based alloy. In: Advanced Materials Research. pp 303–307Google Scholar
- 32.French PW, Naeem M, Sharp M, Watkins KG, (2006) Investigation into the influence of pulse shaping on drilling efficiency. In ICALEO 2006 Proceedings. Laser Institute of America, Orlando, FL (United States), Paper 310Google Scholar
- 33.French PW, Hand DP, Peters C, Shannon GJ, Byrd P, Steen WM (1998) Investigation of the Nd: YAG laser percussion drilling process using high speed filming. ICALEO 98 Proc 85:1–10Google Scholar
- 35.Roy RK (2010) A primer on the Taguchi method, 2nd ed. Society of Manufacturing EngineersGoogle Scholar
- 36.Corcoran A, Sexton L (2000) The laser drilling of multi-layer Rene80 and X40 material systems. Laser Mater Process 89:163–172Google Scholar
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