Microstructural Pattern Formation during Far-from-Equilibrium Alloy Solidification
Journal Article
·
· Physical Review Letters
- Northeastern Univ., Boston, MA (United States)
- Colorado School of Mines, Golden, CO (United States)
We introduce a new phase-field formulation of rapid alloy solidification that quantitatively in- corporates non-equilibrium effects at the solid-liquid interface over a very wide range of interface velocities. Simulations identify a new dynamical instability of dendrite tip growth driven by solute trapping at velocities approaching the absolute stability limit. They also reproduce the formation of the widely observed banded microstructures, revealing how this instability triggers transitions between dendritic and microsegregation-free solidification. Predicted band spacings agree quantita- tively with observations in rapidly solidified Al-Cu thin films.
- Research Organization:
- Northeastern Univ., Boston, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
- Contributing Organization:
- Colorado School of Mines
- Grant/Contract Number:
- SC0020870; FG02-07ER46400
- OSTI ID:
- 1908682
- Alternate ID(s):
- OSTI ID: 1906280
- Journal Information:
- Physical Review Letters, Vol. 130, Issue 2; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Phase-field investigation on the non-equilibrium interface dynamics of rapid alloy solidification
Microstructure selection in thin-sample directional solidification of an Al-Cu alloy: In situ X-ray imaging and phase-field simulations
Interface velocity dependent solute trapping and phase selection during rapid solidification of laser melted hypo-eutectic Al-11at.%Cu alloy
Thesis/Dissertation
·
Sat Jan 01 00:00:00 EST 2011
·
OSTI ID:1908682
Microstructure selection in thin-sample directional solidification of an Al-Cu alloy: In situ X-ray imaging and phase-field simulations
Journal Article
·
Mon May 01 00:00:00 EDT 2017
· Acta Materialia
·
OSTI ID:1908682
+5 more
Interface velocity dependent solute trapping and phase selection during rapid solidification of laser melted hypo-eutectic Al-11at.%Cu alloy
Journal Article
·
Wed Jun 03 00:00:00 EDT 2020
· Acta Materialia
·
OSTI ID:1908682
+2 more