Surface Engineering
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Formation of nitrided layers on duplex steel – influence of multiphase substrate
Surface Engineering - Tập 26 Số 4 - Trang 299-304 - 2010
The present paper reports the results of gas nitriding of duplex stainless steel
and study of the effect of substrate structure on the nitrided layers. The
differences in the growth of the layers on austenitic and ferritic substrate
were studied. The microstructure and phase composition of the layers were
investigated using light microscopy analysis), X-ray diffraction (XRD and
grazing angle XRD –...
Low temperature gaseous nitriding and carburising of stainless steel
Surface Engineering - Tập 21 Số 5-6 - Trang 445-455 - 2005
The response of various austenitic and duplex stainless steel grades to low
temperature gaseous nitriding and carburising was investigated. Gaseous
nitriding was performed in ammonia/hydrogen mixtures at temperatures <723 K;
gaseous carburising was carried out in carbon monoxide/hydrogen mixtures for
temperatures ≤783 K. The case developed by thermochemical treatment was examined
using reflected l...
Microstructural studies of e-beam evaporated alumina thin films
Surface Engineering - Tập 30 Số 8 - Trang 594-599 - 2014
Alumina thin films of different thicknesses, e.g. 90, 120 and 150 nm, were grown
on SS304 thin foil by electron beam evaporation technique. The films were
post-heat treated at 500, 700 and 800°C in air and subsequently characterised by
X-ray diffraction, atomic force microscopy, field emission scanning electron
microscopy and X-ray photoelectron spectroscopy. The effects of thicknesses and
post-he...
Sputter deposition of nanostructured antibacterial silver on polypropylene non-wovens
Surface Engineering - Tập 24 Số 1 - Trang 70-74 - 2008
Nanostructured silver films were deposited at room temperature on polypropylene
non-wovens by radio frequency magnetron sputter coating to obtain the
antibacterial properties, and the relationship between sputter parameters and
antibacterial properties were investigated in this paper. The antibacterial
activity of the materials was assessed using shake flask test. The effects of
silver film deposi...
Characterisation of microdischarge evolution and coating morphology transition in plasma electrolytic oxidation of magnesium alloy
Surface Engineering - Tập 23 Số 5 - Trang 324-328 - 2007
The present paper studied the appearance evolution of microdischarges, the phase
composition and the morphology transition of the coating formed by plasma
electrolytic oxidation on AZ91D magnesium alloy. The appearance of
microdischarges population experienced apparent changes in size, spatial density
and colour, which related with the changes of the type and quantity of the
disintegrated gas bubb...
Rake and Flank Wear Mechanisms of Coated Cemented Carbides
Surface Engineering - Tập 1 Số 1 - Trang 43-58 - 1985
A series of commercially available cemented carbides coated with single or
composite layers of TiC, TiN, and Al2O3 were used to cut three types of steel,
En 8 (080M40), En9 (070M55), and En24 (817M40). For comparison, two uncoated
cemented carbides and some Al2O3-ceramic inserts were also tested. The worn
surfaces were examined using optical and scanning electron microscopy techniques
and tool/wor...
Effect of deposition parameters on TiAlN coating using pulsed DC CFUBMS
Surface Engineering - Tập 29 Số 4 - Trang 287-295 - 2013
This paper aims to investigate the parametric effect of deposition and target
frequency on the mechanical properties and machining performance of the TiAlN
coatings deposited in a dual cathode pulsed dc CFUBMS system. Coating
composition is not directly dependent on deposition temperature or target
frequency individually but increase in both the parameters has led to Al rich
coating. The coating t...
FEM Simulation of Two Sided Laser Shock Peening of Thin Sections of Ti-6Al-4V Alloy
Surface Engineering - Tập 19 Số 2 - Trang 127-133 - 2003
Laser shock peening (LSP) is a fatigue enhancement surface treatment for
metallic materials. The key beneficial characteristic of LSP is the presence of
compressive residual stresses mechanically produced by shock waves within the
metallic materials, which can significantly improve their fatigue life and
fatigue strength. During LSP, a laser beam can be directed to impact on either
one side or two...
Hardness of submicrometre abrasive particles and polish rate measurements
Surface Engineering - Tập 15 Số 4 - Trang 324-328 - 1999
Metal surfaces (copper and tantalum) and films (copper and tungsten) and silicon
dioxide films were polished in deionised (DI) water using submicrometre sized
alumina particles of varying density in benchtop Struers and Strasbaugh
polishers. The polish rates for copper and tantalum in DI water increase
significantly when the abrasive particle density exceeds a threshold value that
correlates with ...
Performance evaluation of HVOF sprayed WC-10Co4Cr coatings under slurry erosion
Surface Engineering - Tập 35 Số 9 - Trang 816-825 - 2019
Slurry erosion is one of the main failure modes of the hydraulic turbine parts,
mud pumps and drill pipes. The high velocity oxygen fuel (HVOF) spray process
has been widely used for depositing protective coatings especially the cermet
coatings that can significantly improve the slurry erosion resistance of
substrate materials. In this work, conventional WC-10Co4Cr composite coatings
and coatings ...
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