Chromium cast irons (CCI) comprise versatile materials that encompass a range of compositions and microstructures often chosen to promote good wear resistance. There are, however, issues arise when the iron is required operate in conditions where corrosion, as well as, factor. This scenario usually results adapting composition CCI order achieve higher chromium content metallic matrix and, there...

Abstract. This research presents the microstructural evolution and mechanical properties of a hypoeutectic AlSi11Cu alloy obtained through laser powder bed fusion (L-PBF) subsequent severe plastic deformation. The as-built demonstrated structure formed by an Al matrix surrounded Si-enriched cellular network. Tensile tests indicated yield strength 350 MPa elongation to fracture lower than 5% for...

Scanning laser melting was employed to investigate directional solidification in Al–Cu thin films, 200 and 500 nm thick. The alloy with both eutectic hypoeutectic compositions, were co-deposited on fused silica substrates by magnetron sputtering. Melting of the films carried out air using a CW laser, as function scan velocity, v, up 5 cm/s. For regular lamellar microstructure observed over enti...

Large gains in strength and ductility are of little significance if the material’s anisotropy is high. Therefore, improving mechanical properties reducing Al alloys obtained by additive manufacturing a topic growing interest. This manuscript examines effect distinct heat treatments on mechanical, anisotropic, microstructural behavior hypoeutectic, almost eutectic, AlSi11Cu alloy laser powder be...

As AlSi-coated press hardening steel is heated to austenitization temperatures, various Fe−Al intermetallic compounds (e.g. FeAl, Fe2Al5 etc.) and voids are generated throughout the coating, increasing also surface roughness. The goal of this study investigate effects coating roughness, distribution on AlSi fracture during its deformation at elevated temperatures. For purpose, hot tensile exper...

Primljeno (Received): 2011-11-07 Prihvaćeno (Accepted): 2012-03-15 Original scientific paper Abstract: Pressure die casting is the method used for forcing molten metal into mould cavities under high pressure and at high speed (10 100 m.s). Pressure die casting is a highly productive method of casting parts with low dimensions tolerance and high surface quality. From the point of view of product...

Synthetic noncrystalline aluminosilicates with variable charge, similar to allophanes present naturally in volcanic soils, were studied. The surface charge behavior was determined by zero point charge (ZPC) measured by electrophoretic mobility (isoelectric points, IEP) and determined by potentiometric titration (point of zero salt effect, PZSE). The ZPC calculated by Parks model (ZPC(c)), compa...

We present a case study where we use automated formal analysis to reason about problem-frame concerns. The descriptions of the problem domains, machine and requirements are written in the Alloy language. We show that an evaluation of results and counterexamples provided by a model finder can reveal useful information that can help remove inconsistencies as well as composition errors.