EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

Metallic glasses are a promising class of materials for a variety of applications. In many ways these amorphous solids outperform their crystalline counterparts. Rapid cooling of metallic melts to temperatures below a characteristic glass-transition temperature is necessary to avoid crystallisation and to obtain the glassy state. However, the only very subtle changes of the atomic structure...

The article deals with issues related to the phenomenon of pre-inoculation of liquid cast iron as one of the key stages of preparation of high quality cast iron. The theoretical part includes a review of available literature on this subject, discusses basic concepts associated with graphite nucleation concerning the pre-inoculation mechanism. It describes the method of measurement of...

In alloy casting, the formation process of equiaxed structure is still poorly understood. The most difficult point in the formation process of equiaxed structure is that the equiaxed grains can move in liquid phase due to forced convection and buoyancy force. To understand the behavior of 3D equiaxed grains, the time-resolved X-ray tomography was performed as a state-of-the-art experimental...

The experiments aimed to investigate the effect of stirring by Travelling Magnetic Field on the solidified micro- and mesostructure of Al7Si alloy without and with grain refinement (GR).
The solidification experiments were performed in a Bridgman-type furnace in earth conditions at a constant sample-movement velocity (vmov = 0.1 mm/s) and different temperature gradients (G) without stirring...

In this work Al- Cu alloys with three different compositions (Al- 4wt% Cu, Al- 10wt%, and Al- 20wt% Cu) have been investigated by Differential Thermal Analysis (DTA) using different cooling rates (1; 2.5; 5 and 10 K/s). Liquidus and eutectic temperatures have been determined. Based on the results obtained, the amount of α/eutectic microstructural elements was calculated using a special model...

Wire arc additive manufacturing (WAAM) is a recently developed technology based on gas tungsten arc welding (GTAW) process. It allows fabrication of 3D metal components via progressive melting and layer-by-layer solidification of a metal wire. Several wires supplied at a variable feed rate allow to carry out in-situ alloying during manufacturing and produce components with...