|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Frontiers in Solidification: An MPMD Symposium in Honor of Michel Rappaz
||The Application of Oriented Alloy Single Crystals to the Study of Solidification, Mass Transport, and Related Phenomena: Prior Progress and Future Potential
||Lynn A. Boatner, Michel Rappaz
|On-Site Speaker (Planned)
||Lynn A. Boatner
By using oriented alloy single-crystal specimens it is possible to employ a metallographic approach that results in quantifiable and reproducible solidification microstructures in which the roles played by crystallographic effects and heat flow are clearly delineated. Our early work utilized both moving and stationary heat sources and focused on the re-solidification/microstructural characteristics of melt pools formed in single crystals of a stainless steel 70%Fe,15%Ni,15% Cr ternary alloy. By employing a series of micrographs obtained by transverse sectioning of the specimens along principal directions of the overall microstructure, it was possible to carry out and model three-dimensional reconstructions of the solidification microstructures for e-beam and gas-tungsten-arc melted pools. Subsequently, these materials were used to study the pool morphology and mass transport properties under low-gravity and terrestrial conditions. This latter approach has significant and currently unrealized potential.