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Al-Sn nanostructured coatings on aluminum surfaces using electrospark alloying and their wear behawior

Yurchenko E. V., Rushika I. D., Agafii V. I., Dikusar A. I.

Journal of Mechanical and Energy Engineering

2018

Vol. 2, No 2

115--120

At electrspark alloying (ESA) of aluminum surfaces using Al-Sn tool-electrode (TE), nanostructuring of manufactured surfaces take place owing to the formation of SnO2 nanofibers. Examining the tribological properties of these surfaces in a friction couple with a counterbody made of hardened steel showed that the wear of counterbody during the friction in the oil and at dry friction exceeds by an order of magnitude and above it the wear of such surfaces.

Semi-continuous caster for plate

Haga T., Miyazaki K.

Journal of Achievements in Materials and Manufacturing Engineering

2017

Vol. 84, nr 2

58--67

Purpose: Development of a semi-continuous caster that can cast a single plate and a clad plate of Al-40%Sn-1%Cu alloy used for sliding bearings. Design/methodology/approach: A semi-continuous caster to cast a single plate and a clad plate directly from molten metal was designed and assembled. The cast single plate has a thickness ranging from 10 mm to 30 mm, a width of 400 mm, and a length of 500 mm to 1,000 mm. The cast clad plate has a thickness ranging from 10 mm to 30 mm, a width of 50 mm, and a length of 300 mm. Findings: The semi-continuous caster successfully produced both a single plate and a clad plate of Al-40%Sn-1%Cu alloy. Influence of casting conditions on the properties of the plate, including the thickness, porosity, and surface quality were investigated in the single plate casting. The mixing and diffusion of the alloy elements at the interface was also investigated in the clad plate casting. Research limitations/implications: The cast Al-40%Sn-1%Cu alloy plate has not yet been tested as a sliding bearing material, so the efficacy of the material still requires investigation. Practical implications: The semi-continuous caster described in this paper enables the “small lot” production made from single and clad plates of aluminium alloy. Originality/value: Development of a semi-continuous caster that can cast both single and clad plates of aluminium alloy. Investigation of the relationship between the casting conditions and plate quality.