Striking differences in the solidification textures of a nickel based alloy owing to changes in laser scanning pattern during additive manufacturing are examined based on theory and experimental data. Understanding and controlling texture are important because it affects mechanical and chemical properties. Solidification texture depends on the local heat flow directions and competitive grain gr...

Presented work shows the results of DSC measurement for six Sn based solders. The alloys Sn96Ag4, Sn99Cu1, Sn97Cu3, Sn96.5Ag3Cu0.5, Sn95.5Ag3.8Cu0.7 and Sn63Pb37 were studied in the temperature range from room temperature up to 400◦C. The transformation temperatures for melting as well as for solidification were influenced by the composition and thermal history of the alloys. The thermal histor...

Electron beam welds between dissimilar stainless steels with different solidification modes were studied with a view to elucidating the role of nucleation, cooling rate and direction of dendrite growth on the tendency towards metastable phase solidification. The results are compared with the solidification behaviour of levitation melted samples. It is demonstrated that with careful design, stai...

In typical solidification processes the flow of molten metal is usually regarded as an unavoidable phenomenon potentially affecting the morphology of dendritic growth. Fundamental understanding of such flow is thus important for predicting and controlling solidification microstructures. This paper presents numerical simulations on the evolution of dendritic microstructures with melt convection....

Kinetic phase diagrams in technical alloys at different solidification velocities during rapid solidification are of great importance for guiding the novel alloy preparation, but are usually absent due to extreme difficulty in performing experimental measurements. In this paper, a phase-field model with finite interface dissipation was employed to construct kinetic phase diagrams in the ternary...

A comprehensive methodology that takes into account alloy solidification, shrinkage-driven interdendritic fluid flow, hydrogen precipitation, and porosity evolution has been developed for the prediction of microporosity fraction in aluminum A356 alloy castings. The mathematical models presented are implemented in a computational framework consistent with those of commercial casting codes, allow...

I employ the van der Waals theory of Baus and co-workers to analyze the fast, adiabatic decay of a supercooled liquid in a closed vessel with which the solidification process usually starts. By imposing a further constraint on either the system volume or pressure, I use the maximum-entropy method to quantify the fraction of liquid that is transformed into solid as a function of undercooling and...

This paper presents a new system to control secondary cooling water sprays in continuous casting of thin steel slabs, CONONLINE. It uses real-time numerical simulation of heat transfer and solidification within the strand as a software sensor, in place of unreliable temperature measurements. The one-dimensional finite-difference model, CON1D is adapted to create the real-time predictor of the s...

The vast majority of steel weld deposits solidify under highly nonequilibrium cooling conditions. A consequence of this is the chemical segregation of substitutional alloying elements during solidification, a segregation that persists as the weld cools to ambient temperature. Solidification-induced segregation of interstitials is usually not a problem due to the ease with which they can diffuse...

This paper proposes a method for fabricating suspended micro/nanoscale polymer fibers continuously, in which polymeric micro/nanofibers are formed by drawing and solidification of a viscous liquid polymer solution which is pumped through a glass micropipette. By controlling the drawing parameters, this method is demonstrated to form networks of suspended fibers having amorphous internal structu...