Achieving the Minimum Roughness of Laser Milled Micro-Impressions on Ti 6Al 4V, Inconel 718, and Duralumin

Autor: Ayoub Al-Zabidi, Adham E. Ragab, Khaja Moiduddin, Ateekh Ur Rehman, Naveed Ahmed, Kashif Ishfaq, Usama Umer, Rakhshanda Naveed
Rok vydání: 2020
Předmět:
0209 industrial biotechnology
titanium alloy
Materials science
parametric optimization
statistical modeling
Alloy
chemistry.chemical_element
laser milling
02 engineering and technology
Surface finish
engineering.material
lcsh:Technology
Article
law.invention
020901 industrial engineering & automation
Aluminium
law
Surface roughness
General Materials Science
Composite material
lcsh:Microscopy
Inconel
Duralumin
lcsh:QC120-168.85
lcsh:QH201-278.5
lcsh:T
Titanium alloy
nickel alloy
021001 nanoscience & nanotechnology
Laser
chemistry
lcsh:TA1-2040
surface roughness
engineering
micro-impressions
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
aluminum alloy
lcsh:Engineering (General). Civil engineering (General)
0210 nano-technology
lcsh:TK1-9971
Zdroj: Materials
Volume 13
Issue 20
Materials, Vol 13, Iss 4523, p 4523 (2020)
ISSN: 1996-1944
Popis: Titanium-aluminium-vanadium (Ti 6Al 4V) alloys, nickel alloys (Inconel 718), and duraluminum alloys (AA 2000 series) are widely used materials in numerous engineering applications wherein machined features are required to having good surface finish. In this research, micro-impressions of 12 µ
m depth are milled on these materials though laser milling. Response surface methodology based design of experiment is followed resulting in 54 experiments per work material. Five laser parameters are considered naming lamp current intensity (I), pulse frequency (f), scanning speed (V), layer thickness (LT), and track displacement (TD). Process performance is evaluated and compared in terms of surface roughness through several statistical and microscopic analysis. The significance, strength, and direction of each of the five laser parametric effects are deeply investigated for the said alloys. Optimized laser parameters are proposed to achieve minimum surface roughness. For the optimized combination of laser parameters to achieve minimum surface roughness (Ra) in the titanium alloy, the said alloy consists of I = 85%, f = 20 kHz, V = 250 mm/s, TD = 11 µ
m, and LT = 3 µ
m. Similarly, optimized parameters for nickel alloy are as follows: I = 85%, f = 20 kHz, V = 256 mm/s, TD = 8 µ
m, and LT = 1 µ
m. Minimum roughness (Ra) on the surface of aluminum alloys can be achieved under the following optimized parameters: I = 75%, f = 20 kHz, V = 200 mm/s, TD = 12 µ
m. Micro-impressions produced under optimized parameters have surface roughness of 0.56 µ
m, 2.46 µ
m, and 0.54 µ
m on titanium alloy, nickel alloy, and duralumin, respectively. Some engineering applications need to have high surface roughness (e.g., in case of biomedical implants) or some desired level of roughness. Therefore, validated statistical models are presented to estimate the desired level of roughness against any laser parametric settings.
Databáze: OpenAIRE
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