The development of an efficient procedure for 3d modeling and finite element simulation of metal foams is one of the greatest challenges for engineer researchers nowadays. Creating 3d CAD model is alone a demanding engineering task due to its extremely complex geometry, and the proper finite element analysis process is still in the center of the research. The increasingly widespread application of the metal foams, e.g. in vehicle and medical industry, requires this knowledge in the design phase. A closed-cell metal foam is studied using different analyzing methods where the aim is to collect information about the composition and geometry (structure) that is satisfactory for the later research. Using statistical methods microscopic, X-ray and surface analyzing studies on the specimens produced according to the concerning standard are evaluated. The main goal of this part of the project is to obtain structural information and to determine the homogeneity or the in-homogeneity property of the metal foam specimens taken from different locations.

The wear behaviour of two martensitic and one multiphase steel targeted for abrasion and erosion applications in agriculture and mining industry were investigated in three abrasive test systems with different complexity. Scratch tests were performed with different indenter radii, shapes, and loads. The material behaviour was also investigated in multi-asperity contact systems. Pin-on-disc tests were performed with various loads and abrasive particles, as well as abrasive slurry-pot tests with different sliding velocities, distances, and impact angles of the abrasive media were performed. Comparing the test systems, the tested materials ranked similarly based on their wear performance, however, in each configuration, the dominant variable of the wear mechanism differed. The significance and contributions of test paramecenterters, the material’s mechanical properties (H, ${\sigma }_M$, ${\sigma }_Y$, E, ε${\mathsf{\epsilon }}_M$, ε${\mathsf{\epsilon }}_B$, W, ${\sigma }_c$, $E_c$) and the dimensionless numbers formed from them were investigated on the wear behaviour and the surface deformation. Correlation between parameters was established by multiple linear regression models. The sensitivity of the tested materials to abrasion was evaluated taking into account the wide range of influencing parameters.

This paper presents the usage of spark plasma sintering (SPS) as a method to obtain aluminum-expanded perlite syntactic foams with high porosity. In the test samples, fine aluminum powder with flaky shape particles was used as matrix material and natural, inorganic, granular, expanded perlite was used as a space holder to ensure high porosity (35–57%) and uniform structure. SPS was used to consolidate the specimens. The structures were characterized by scanning electron microscopy and compression tests. Energy absorption (W~7.49 MJ/m³) and energy absorption efficiency (EW < 90%) were also determined.

Metal foams have a lightweight cellular structure with excellent mechanical and physical properties. Although metal foams are popular, they are still not sufficiently characterized thanks to their extremely complex structure which is highly stochastic in nature. In this paper the influence of the technological parameters on the structure is analyzed. In laboratorial circumstances the production of closed cell aluminum foams depends on several factor. The purpose of the paper is to analyze the human factor on the quality of the metal foam specimens.

A fémhabok cellás szerkezetük és kiváló mechanikai és fizikai tulajdonságaik révén előtérben vannak a jármű és egyéb iparágak anyagfejlesztéseiben. Ugyan a különböző típusú fémhabok közkedveltek, a bonyolult szerkezetük miatt továbbra is kutatások tárgyai. Jelen kutatás célja különböző gyártástechnológiával készült és különböző cellaméretű zártcellás fémhabok tribológiai vizsgálata. A cikkben bemutatásra kerülnek a vizsgálat tárgyai, azaz a direkt habosítással és gázinjektálással készült zártcellás alumíniumhabok és azok mátrixanyagai. Részletezésre kerül továbbá a kísérletekhez használt Pin on Disc vizsgálóberendezés, valamint a kísérletek legfontosabb paraméterei.