Optimization of AlSi–CNTs functionally graded material composites for engine piston rings

Effect of HAp and β‐TCP incorporation on the tribological response of Ti6Al4V biocomposites for implant parts

“…Samples with a thickness of 6 mm were processed by HP in a 8 mm diameter graphite die, at 1175°C and 40 MPa, for 1 h, with an heating ramp of 30°C min −1 and cooling rate of 20°C min −1 . The processing of biocomposites using HP in the aforementioned conditions was proved to be effective in preserving the mechanical and chemical properties of the bioactive phase . It has been demonstrated in another study, under submission, that the addition of a bioactive phase to the Ti alloy substantially increases its bioactivity.…”

“…15,16 To overcome this potential issue, functionally grade materials (FGMs) constitute a worthy alternative since a gradual transition between materials leads to the reduction of interfacial residual stresses and improves the fatigue and mechanical behavior, therefore preventing the coatings drawbacks. [17][18][19][20][21][22] Arguably, some of most promising techniques to process FGMs where an external composite layer, containing HAp or b-TCP, acts as a natural transition with no substantial residual stresses and smooth transition between the metallic bulk and implant surface, are hot pressing (HP) or hot isostatic pressing (HIP). 15 The tribological characterization of Ti6Al4V under lubricating conditions mimicking those found in vivo applications is of particular interest, since this alloy has been extensively used in prosthesis and implants.…”

Computer Engineering and Design of Cast Parts for Internal Combustion Engine Crankcase

“…The current state of the issue of design of engine parts and CAD of technological preparation of production at one of the defining stages of production of engine partsthe manufacture of cast engine partsdoes not allow talking about an effective compromise, often in real production, we can talk about deep contradictions [1,[3][4][5]. The reason for this is the lack of knowledge of many processes occurring during the formation of the casting and ultimately determine the real, not theoretically designed design of the part, as well as the accuracy of the geometric parameters, which is one of the main indicators of the quality of cast parts of the internal combustion engine.…”

“…First of all, this applies to the production of cast engine parts (80-90 % of cast parts by weight in the design of the engine). The level of harmonization of design and technological approaches necessarily implies a compromise between design development and the design and implementation of the technological process of their production, is the determining factor in obtaining quality parts, ensuring the achievement of the specified performance, reliability, and resource engine [2][3][4]. The technological aspects must be taken into account in the design and application of CAD for engines.…”

Tribological properties of twin wire arc spray coated aluminum cylinder liner

“…Concerning further to material development, the continuing demand for increase in the efficiency of new engines requires the development of novel technologies that can significantly increase the wear resistance, decrease the frictional loss, improve the cooling capacity, and reduce the weight by the substitution of gray cast iron cylinder [17][18][19][20][21][22][23][24]. In this context, aluminum alloy engine blocks have been used instead of the conventional cast iron engine blocks to improve the energy efficiency through weight reduction of engines.…”