Volume 46, Issue 11

In this paper, the possibility of implementation of the infrared thermography as a technical systems’ diagnostic method is investigated. The infrared thermography as a contemporary method was used for visualization of the working conditions in the piston of an automotive engine as well as for analyzing of the thermal changes the piston sustained under exploitation. The obtained results were used to define the properties of the alloy used for production of the piston for a highly loaded diesel engine. In such way, the problems caused by erroneous choice of the material could be avoided.

In this study, the machinability 2024Al/Al 2 O 3 particle composite was investigated in terms of tool wear, tool life and surface roughness by turning process with TiN (K10) coated and HX uncoated carbide tools at different cutting conditions. The test results showed that tool life decreased with increasing the cutting speed for both cutting tools and tool life of TiN (K10) tool was significantly longer than that of HX tool. It was observed that the major wear forms of the tools were the combination of rounding of nose and flank wear. The optimum surface roughness was obtained at the cutting speed of 160 m min −1 .

In this study, the effect of welding speed on the laser welding of AISI 430 ferritic stainless steel with AISI 1010 low-carbon steels was investigated. Laser welding experiments, were carried out under argon atmosphere, 2000 W constant welding power and 100, 200, 300 cm/min welding speeds. The microstructures of the welded joints were examined by optical microscopy and SEM analysis. The tensile strength of the welded joints was measured. The result of all observations, tests and measurements indicated that the best properties were observed at the specimens welded at 100 cm/min welding speed.