Dynamical studies of dendritic growth

Journal Article · Sat Jun 01 04:00:00 EDT 1985 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(85)90198-1· OSTI ID:6490840

Somboonsuk, K; Trivedi, R

Directional solidification studies are carried out in succinonitrile-acetone system to investigate the stability of dendritic interfaces. Time dependent changes in the interface pattern are examine as the externally imposed velocity is suddenly altered. A hysteresis effect is observed in the interface restabilization process, and the different mechanisms which operate during the increase and decrease in velocity are discussed to understand the hysteresis effect. It is found that in all cases the mechanism which selects the constant, steady-state, dendrite tip radius is quite sharp, and the dendrite tip alway restabilizes to the value which is just marginally stable. The selection process for the constant primary spacing, however, is found not to be very sharp.

• Research Organization: Ames Laboratory U.S. DOE and the Department of Materials Science and Engineering, Iowa State University, Ames, IA
• OSTI ID: 6490840
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 33:6; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ACETONE
CRYSTAL GROWTH
CRYSTAL GROWTH METHODS
CRYSTALS
DENDRITES
DENDRITIC WEB GROWTH METHOD
DISTRIBUTION
HYSTERESIS
KETONES
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHASE TRANSFORMATIONS
SOLIDIFICATION
SPATIAL DISTRIBUTION
STABILIZATION