Solidification of Highly Undercooled Liquid Droplets

reportActive / Technical Report | Accession Number: ADA218776 | Open PDF

Abstract:

Research has been focused upon metastable phase formation and the controlling phase selection reactions, the evolution of solidification microstructure under the combined influence of undercooling, recalescence and external cooling and several other aspects of undercooled alloy solidification and product structure stability. The experimental approach that has been applied to carry out these studies is based on the droplet emulsion technique. With this method, samples may be produced which exhibit large undercoolings prior to solidification during slow cooling 10-30 deg Cmin and which may be maintained in the metastable undercooled state for extended time periods without the intervention of crystallization.

Author(s):
Perepezko, J. H.
Author Organization(s):
WISCONSIN UNIV MADISON
Descriptive Note:
Final rept. 1 Jul 1986-30 Jun 1989
Supplementary Note:
DOI: 10.21236/ADA218776
Pagination:
0075

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARO-23617.13-MS
Contract/Grant Number(s):
DAAL03-86-K-0114
Monitor Series:
23617.13-MS, ARO
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2.7_Experimentation; JCA_1.3.2_Personnel Management
Modernization Areas:
Directed Energy
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*DROPS, *LIQUID PHASES, *METASTABLE STATE, *MICROSTRUCTURE, *SOLIDIFICATION, APPROACH, COOLING, CRYSTALLIZATION, EMULSIONS, EVOLUTION(GENERAL), EXPERIMENTAL DATA, EXTERNAL, INTERVENTION, LONG RANGE(TIME), PRODUCTION CONTROL, SELECTION, STABILITY
Field(s)/Group(s):
Metallurgy and Metallography
Report Date:
1990 Jan 01