Investigation of recast and crack formation in laser trepanning drilling of CMSX-4 angled holes
| Autor: | Sundar Marithumu, Stephen K. Gray, Nicolau Iralal Morar, Rajkumar Roy, John Nicholls, Jörn Mehnen, Tracey Roberts |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Trepanning Materials science Laser trepanning drilling 02 engineering and technology Industrial and Manufacturing Engineering law.invention Surface cracks 020901 industrial engineering & automation law Composite material Parametric statistics Number density Mechanical Engineering Design of experiments 021001 nanoscience & nanotechnology Laser Computer Science Applications Power (physics) CMSX-4 Superalloy Recast layer TA Control and Systems Engineering TA174 0210 nano-technology Software Laser drilling |
| ISSN: | 0268-3768 1433-3015 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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