Pacella_Hazzan2022_Article_UnderstandingTheSurfaceIntegri.pdf (8.59 MB)
Download fileUnderstanding the surface integrity of laser surface engineered tungsten carbide
journal contribution
posted on 2022-01-28, 11:02 authored by Kafayat HazzanKafayat Hazzan, Manuela PacellaManuela Pacella, Tian Long SeeAbstractThe study investigated the effect of fibre laser processing (1060 nm, 240-ns pulse duration) on the surface integrity of tungsten carbide (WC). The induced surface damage ranged from crack formation, porosity, balling, to spherical pores; the severity and presence of each were dependent on the laser parameters selected. The influence of fluence (0.05–0.20 J/cm2), frequency (5–100 kHz), feed speed (250–2500 mm/s) and hatch distance (0.02–0.06 mm) on 2D and 3D surface roughness were analysed using the Taguchi technique. Fluence, frequency, and the interaction effect of these were the most influential factors on the surface integrity; from this a linear model was generated to predict the surface roughness. The model performed best at moderate to medium level of processing with an error between 1 and 10 %. The model failed to predict the material response as accurately at higher fluences with percentage errors between 15 and 36 %. In this study, a crack classification system and crack density variable were introduced to estimate the number of cracks and crack type within a 1-mm2 area size. Statistical analysis of variance (ANOVA) found that fluence (63.49%) and frequency (29.38%) had a significant effect on the crack density independently but not the interaction of both. The crack density was minimised at 0.149 J/cm2 and 52.5 kHz. To the author’s knowledge, for the first time, a quantitative analysis of the crack formation mechanism for brittle materials is proposed (post laser processing).
Funding
Manufacturing Technology Centre (MTC) in support of the Ph.D studentship
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
The International Journal of Advanced Manufacturing TechnologyVolume
118Issue
3-4Pages
1141 - 1163Publisher
Springer Science and Business Media LLCVersion
- VoR (Version of Record)
Rights holder
© the AuthorsPublisher statement
This is an Open Access Article. It is published by Springer under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/Acceptance date
2021-08-15Publication date
2021-09-14Copyright date
2022ISSN
0268-3768eISSN
1433-3015Publisher version
Language
- en
Depositor
Deposit date: 28 January 2022Usage metrics
Categories
No categories selectedKeywords
Tungsten carbideLaser processingSurface optimisationLaser modellingSurface integrityCrack formationScience & TechnologyTechnologyAutomation & Control SystemsEngineering, ManufacturingEngineeringWC-COABLATIONFRACTURETOOLOPTIMIZATIONPARAMETERSINITIATIONHARDMETALMECHANISMROUGHNESSIndustrial Engineering & AutomationMathematical SciencesInformation and Computing Sciences