Three kinds of rapidly solidified samples were processed for each composition: ribbons, wedge, and cylindrical samples.
Plastic behaviour is studied using gradient solidified samples and characterisation models for the parameters of the Hollomon equation are developed, based on microstructural refinement.
Detailed microstructural analyses of the rapidly solidified samples deposited from the modified alloys showed that addition of Nb in specific quantities induces a significant microstructural refinement in the original Ni Cr B Si C alloy without deteriorating its high hardness.
Experimental growth laws relating the primary dendrite arm spacing, λ1, of directionally solidified samples to solidification thermal parameters such as the growth rate and the cooling rate are proposed.
Post-solidified samples were then subjected to further microstructural analysis, whereby the lamellar eutectic spacings were measured at random locations across the FOV region.
The experiment consisted of solidifying a rectangular ingot of pure tin and binary Sn-3 wt% Pb alloy using two lateral heat exchangers to extract the heat flux from two sides of the solidifying sample.
In the solidifying samples, fine columnar γ grains (FCG) always exist ahead of the CCG region.
Obtained by the three different methods, the solid fractions versus solidification temperatures of the solidifying samples are compared with one another, and the three different methods are discussed.
The comparative X-ray scattering study of two glassy PET samples (7500 and 17°C/s) reveals the occurrence of frozen-in electron density states giving rise to an excess of scattering for the amorphous sample solidified at a lower cooling rate.
Hence, it is more appropriate to use the data from re-solidified sample experiments during experimental data workup and analysis.
Some interesting differences between the samples solidified in space and their counterparts solidified on the ground are described.
