Dendritic structure, PDAS

VZhL22 with 2% rhenium – how withdrawal rate and pouring temperatures affect single-crystal yield

VIAM ran a three-factor designed experiment on a UVNK liquid-metal-cooling furnace and obtained regression models for yield, orientation and PDAS.

Trudy VIAM · 2026 · 6 min read

SolidificationPaper

PDAS across a single-crystal casting – why dendrites are not finest next to the chill ring

In an industrial Bridgman furnace the side of the rod next to the chill ring, where the axial gradient is highest, had a coarser PDAS than the centre. The tilt of the liquidus isotherm matters, not just G and v.

International Journal of Metalcasting · 2026 · 6 min read