Factors affecting the grain-refinement of aluminum using titanium and boron additives

Journal Article · Tue Jun 01 04:00:00 EDT 1976 · Metall. Trans., B; (United States)

DOI:https://doi.org/10.1007/BF02654921· OSTI ID:7338060

Jones, G P ^[1]; Pearson, J

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1. National Physical Lab., Teddington, Eng.

The development of grain-refining techniques for the casting of aluminum, and the results achieved using additions of ternary Al--Ti--B master-alloys, are briefly described. A test procedure is given for assessing the relative effectiveness of these master-alloys, and the results are related to the various kinds of alloy treated, including those with constituents which poison the grain-refining agent. The equilibrium conditions which affect the behavior of the constituents of the grain-refined alloys are examined quantitatively from a thermodynamic viewpoint. One theory about the mechanism of nucleation of aluminum on titanium diboride is examined and found inapplicable. New data on the solubility of TiB/sub 2/, ZrB/sub 2/, TiC, ZrC, Cr/sub 3/C/sub 2/, and CrB/sub 2/ in liquid aluminum are presented graphically. Practical aspects of alloy behavior in grain-refining practice are analyzed and discussed on the basis of the quantitative data.

• OSTI ID: 7338060
• Journal Information: Metall. Trans., B; (United States), Journal Name: Metall. Trans., B; (United States) Vol. 156:7B; ISSN MTTBC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
BORIDES
BORON ALLOYS
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CASTING
CHROMIUM BORIDES
CHROMIUM CARBIDES
CHROMIUM COMPOUNDS
ELEMENTS
FABRICATION
FLUIDS
GRAIN REFINEMENT
LIQUID METALS
LIQUIDS
METALS
SOLUBILITY
TITANIUM ALLOYS
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM BORIDES
ZIRCONIUM CARBIDES
ZIRCONIUM COMPOUNDS