The paper describes the influence of the homogenisation temperatures, methods of cooling rate after homogenisation annealing and various extrusion processes (conventional extrusion, press-quenching, billet quenching) upon the microstructural and mechanical properties of AlSi1MgMn (AA6082) alloy at industrial producing conditions.
F.02 Acquisition of new scientific knowledge
Employment of young researcher in the company LTH Castings d.d., on the important development field of FSW of castings. With the use of FSW technology the company LTH Castings enters into a new market niche of producing cooling units, heating units and lubricant reservoirs. With the FSW the company produces pretentious products with higher added value for the automotive industry for production of hybrid and electric vehicles.
F.06 Development of a new product
A comprehensive research of Friction Stir Welding of 4 mm thick aluminium alloy (AlMg4.5Mn) for forming was done. A vast variety of process parameters was tested according to the plan of experiments at constant 2° tilt angle, at tool rotation from 235 - 1180 rev/min at welding speed of 71 – 450 mm/min. A joint gap width varied between 0 – 0.75 mm. Specially designed tensile test specimens were sectioned in the direction of welding and perpendicular to it. The microstructure was prepared for observation on a light microscope under the polarized light source. A Vickers micro-hardens was measured. The results show the influence of FSW process parameters on the formation of microstructure and mechanical properties. A welding of thinner aluminium sheets a care must be taken not the exceed joint gap of 0.25 mm.
F.18 Transfer of new know-how to direct users (seminars, fora, conferences)
COBISS.SI-ID: 11914779