Structure and properties of stir-cast zinc alloys
- Industrial Materials Research Institute, Boucherville, P.Q. (Canada)
Stir casting (or rheocasting) of ZA-27 zinc alloys was investigated experimentally. By vigorously agitating the alloys during cooling, the dendrites that were forming were fragmented giving a unique structure composed of spherical and rosette shaped particles suspended in the remaining liquid. Under high shear rates ({center dot}{gamma} = 300s{sup {minus}1} or more) the slurries with primary particle concentrations as high as 60% displayed viscosities as low as 20 poises and could easily be casted. The effects of processing variables such as shearing and cooling rates and casting temperatures were studied. Their relative importance on the rheological and microstructural behavior of the stir cast alloys are discussed. Results from viscosity measurements on slurries show that non-dendritical ZA-27 alloys obey a power law fluid model. Finally, results from mechanical and compressive studies carried out on solidified slurries are discussed and compared to conventional casted and wrought alloy properties.
- OSTI ID:
- 5251491
- Report Number(s):
- CONF-840909-; CODEN: TMPSA
- Journal Information:
- TMS (The Metallurgical Society) Paper Selection; (USA), Vol. 56; Conference: TMS-AIME fall meeting, Detroit, MI (USA), 16-20 Sep 1984; ISSN 0197-1689
- Country of Publication:
- United States
- Language:
- English
Similar Records
Morphological Evolution of Mg-Al-La-Ca Alloy Induced by a Mechanical Stirring Process
Evolutions of the Micro- and Macrostructure and Tensile Property of Cu-15Ni-8Sn Alloy During Electromagnetic Stirring-Assisted Horizontal Continuous Casting
Related Subjects
ZINC ALLOYS
CASTING
MECHANICAL PROPERTIES
MICROSTRUCTURE
COMPRESSION
COOLING
DENDRITES
FRAGMENTATION
MATHEMATICAL MODELS
MIXING
PARTICLES
RHEOLOGY
SHAPE
SHEAR
SLURRIES
SOLIDIFICATION
VISCOSITY
ALLOYS
CRYSTAL STRUCTURE
CRYSTALS
DISPERSIONS
FABRICATION
MIXTURES
PHASE TRANSFORMATIONS
SUSPENSIONS
360101* - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties