Results of” ball on disc” principle tests to examine the friction coefficient and wear rate of Aluminium Alloys 2024–T3 are presented. Tribocorrosion experiments were performed using a pin on disc ...tribometer under controlled electrochemical conditions in NaCl solution. This paper reviews the available knowledge relating to the tribocorrosion. Tribocorrosion can be defined as a degradation phenomenon of material surfaces (wear, cracking, corrosion, etc.) subjected to the combined action of mechanical loading (friction, abrasion, erosion, etc.) and corrosion attack caused by the environment (chemical and/or electrochemical interaction), as highlighted in Figure. Experimental confirmations of improving electrochemical properties of the aluminium alloy AW 2024 by anode oxidation and extension of the period of excitement AW 2024 after adjusting surface anode oxidation are documented.
The paper deals with the engineering design of lifting device weighing up to 3.5 tons. The first part is devoted to market research and the use of lifting equipment. Variant with a scissor ...construction and a hydraulic drive is chosen. The design itself follows. The machine composes five main parts: the lower frame, the scissor structure, the ramp, the mechanical lock and the drive mechanism. The individual chapters are devoted to design and analysis of these components.
In our previous research, it was suggested that a sort of copper molybdate Cu3Mo2O9 generated on the friction track of aluminum bronze coated with MoO3 powder reduced friction under high temperature ...conditions. In order to study the lubricity of copper molybdate as high temperature lubricant, the lubrication properties of two kinds of copper molybdate powders, CuMoO4 and Cu3Mo2O9, were studied by comparing with the lubricity of CuO and MoO3 powders. These powders were supplied to the sliding surface of the stainless steel specimens as solid lubricant and the friction test was conducted at various ambient temperatures ranging from room temperature to 700°C. Cu3Mo2O9 and CuMoO4 powders were synthesized by heating the mixture of CuO and MoO3 powders in their own specific heating conditions and identified by XRD. Both of Cu3Mo2O9 and CuMoO4 powders showed lower friction coefficient and smaller wear amount of specimen with increasing ambient temperature. On the other hand, CuO and MoO3 powders showed poor lubricating ability and high wear amount of specimens comparing with two kinds of copper molybdate powders. It was suggested that the enhanced maintaining abilities of copper molybdate on the stainless steel substrate at high temperature and generation of unoxidized copper under high temperature conditions could enhance lubricating abilities.
In the field of engineering relatively new designs and manufacturing processes are constantly emerging. These changes are often seen in designing and manufacturing of prototypes or in single part ...production. We decided to analyse an aircraft propeller prototype using modern technologies. Existing aircraft blade design was converted to digital models which were analysed.
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