Open AccessFormation of colours on SS304L stainless steel induced by laser colouring
Author(s) -
R. Linggamm,
M. M. Quazi,
M. Ishak,
M. H. Aiman,
A. Q. Zafiuddin,
Abdullah Qaban
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1078/1/012015
Subject(s) - surface roughness , materials science , laser , surface finish , optics , texture (cosmology) , optical microscope , analytical chemistry (journal) , metallurgy , composite material , scanning electron microscope , chemistry , chromatography , physics , image (mathematics) , artificial intelligence , computer science
In this research, the laser colour marking process was carried out to determine the formation of colour on surface of SS304L stainless steel. The pulse laser nanosecond (1064nm) was used to irradiate the SS304, resulting in the formation of various colour permeating on the sample surface. The surface characterization and surface roughness were analysed by using the 3D optical microscope. The effect of laser processing parameters such as hatching distance, pulse width, and defocusing distance on the evolution of surface colours were investigated. The results show that a thin oxide film was essentially formed that resulted in the formation of four different colours. Each colour exhibited a different surface texture and surface roughness implying the effect of parameters significantly affects the surface characteristics. Grey colour formed registered the highest roughness (R z ) of about 3.5 microns followed by a decreasing roughness trend for blue, purple and green respectively.