Microstructure and Mechanical Properties of a Multiphase FeCrCuMnNi High-Entropy Alloy
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During cold forming processes materials are subjected to non-monotonic complex multiaxial loadings. To obtain complex shapes at low temperature requires the use of particularly ductile materials. The damage behaviour of two ductile steels is studied here a ...
The goal of the present study was to assess the possibility to change the composition of a calcium phosphate scaffold from a high-temperature phase to a phase only stable at or close to room temperature without macrostructural changes. For that purpose, ma ...
W-(0.3-2)Y2O3 and W-(0.3-2)Y materials (in wt.%) have been manufactured by conventional powder metallurgy methods including dry mechanical alloying of elemental powders in Ar atmosphere, cold pressing in air using a pressure in the range of 150-250 MPa and ...
Hot tearing is one of the most severe defects observed in castings, e.g. in billets or sheet ingots of aluminum alloys produced by DC casting. It is due to both tensile strains and a lack of interdendritic feeding in the mushy zone. In order to predict thi ...
The fracture strength of ZnO nanowires vertically grown on sapphire substrates was measured in tensile and bending experiments. Nanowires with diameters between 60 and 310 nm and a typical length of 2 μm were manipulated with an atomic force microscopy tip ...
Hot tearing, a severe defect occurring during solidification is the conjunction of tensile stresses which are transmitted to the mushy zone by the coherent solid underneath and of insufficient liquid feeding to compensate for the volumetric change. The RDG ...
Th. Böllinghaus, H. Herold, C. E. Cross and J.C Lippold2008
The tensile mechanical response of three semi-solid as-cast aluminum alloys - AA3104, AA6111, and CA31218 (an alloy similar in composition to AA3003) - was measured between a fraction solid f(s) similar to 0.85 and f(s) similar to 1 in order to establish t ...
Microstructure, chemical and phase composition of the hard layer formed on the Ti-6Al-4V alloy after duplex surface treatment were investigated by light microscopy (LM), X-ray diffraction (XRD) and analytical scanning, transmission and scanning transmissio ...
A fairly simple experimental setup has been designed for testing the resistance of the mushy zone of alloys during solidification under tensile conditions. It has been used to study the effect of coalescence among the solid grains at a late stage of solidi ...