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Wear resistant coatings were produced on a permanent mould cast MRI 230D Mg alloy by (a) PEO in silicate based electrolyte, (b) PEO in phosphate based electrolyte, (c) hybrid coatings of silicate PEO followed by laser surface alloying (LSA) with Al and Al 2 O 3 , and (d) hybrid coatings of phosphate PEO followed by LSA with Al and Al 2 O 3 . Microstructural characterization...
The effect of sliding temperature and load on the wear behavior of Al–4Cu alloy and Al–4Cu–TiB 2 in situ composites was studied in this paper. The wear resistance of the Al–4Cu alloy increased with increase in wt.% of reinforcement TiB 2 particles at all temperatures and loads. The transition in the wear mode from mild to severe wear was strongly influenced by the addition of TiB ...
In the present investigation, the wear behaviour of a creep-resistant AE42 magnesium alloy and its composites reinforced with Saffil short fibres and SiC particles in various combinations is examined in the longitudinal direction i.e., the plane containing random fibre orientation is perpendicular to the steel counter-face. Wear tests are conducted on a pin-on-disc set-up under dry sliding condition...
Al–7Si alloy reinforced with in situ TiB 2 particles was synthesized successfully by using salt reaction route. These in situ composites have shown significant improvement in mechanical properties in comparison to the base alloy. The wear resistance of the alloy also significantly improved with the addition of TiB 2 particles. The hardness, strength and wear resistance increased with...
This paper reports the dry sliding wear behaviour of AA7075 aluminium/SiC p composites fabricated by powder metallurgy technique. Five factors, five levels, central composite, rotable design matrix is used to optimize the required number of experiments. The wear test has been conducted in a pin-on-roller wear testing machine, under constant sliding distance of 1km. An attempt has been made...
Some bis-(aryl/alkyl)thiuram disulphides, bis-(aryl)xanthogens and (aryl/alkyl)dithiocarbamates were synthesized and their extreme pressure (EP) and anti-wear (AW) properties evaluated using a Seta-Shell four-ball lubricant testing machine. Bis-(phenyl) xanthogen, bis(ethanol) thiuram disulphide, bis-(diethanol) thiuram disulphide, bis-(naphthyl) thiuram disulphide and N,N-diethanol dithiocarbamate...
Lubricants are used to control friction and minimize wear in a variety of tribological applications. When lubricants are used at the contact interface of two sliding surfaces the material loss due to wear and the energy consumption due to friction are reduced by several orders of magnitude. In railroad applications, lubricants are routinely applied to the side of the rails to reduce friction and wear...
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