Full Title New Technology for Structure Control and Mechanical Properties Improvement of Aluminum Alloys by Means of Heat Time Melt Treatment Tech Area / Field

MAT-ALL: Materials / High Performance Metals and Alloys

PHY-STM: Physics / Structural Mechanics

Brief Description of Technology
New technology has been developed for production of castings, ingots and granules of aluminum alloys with grain refinement structures and high mechanical and service properties. Traditionally, such materials are obtained by rapid crystallization or the alloying of aluminum alloys with small additions grain refiners, such as refractory metals or surface active elements. Our technology contains the heat time treatment of the melts and does not break the working cycles. The advantage of this method consists in the simplicity: it requires no specific apparatus, and is cost effective.

The basis of our processing is the hereditary influence of a liquid state on a solid state. According to the measuring physical properties of the melt, the liquid aluminum alloys represent a nonequilibrium microheterogeneous system consisting of the particles with the structure and the composition associated with the initial solid phase.

The variation in the heating temperature changes the heterogeneous state of the melts, that is the quantity and average size of the particles within them, and results in the change of the character of crystallization centers distribution. This phenomena is displayed more strongly in industrial multicomponent aluminum alloys because of the special character of intermetallic interaction forces in these melts.

Legal Aspects
Experimental examinations of the new technology have successfully passed at the Institute of Metals Physics, Ural Division of Russian Academy of Science. Inventions certificates application for the new methods of production of some aluminum alloys have been approved in Russia.

Special Facilities in Use and Their Specifications
None.

Scientific Papers
Brodova I.G., Polents I.V., Popel P.S., “The Effect of Master Alloy Structure in Refinement of Aluminum Alloys with Zirconium,” The Physics of Metals and Metallography, V. 76, pp. 508-512 (1993).

Brodova I.G., Bashlikov D.V., Polents I.V., Yablonskikh T.I., “Effect in Additions on the Structure of Hypereutectic Silumin,” The Physics of Metals and Metallography, V. 79, No. 4, pp. 425-429 (1995).

Brodova I.G., Bashlikov D.V., “The increase in plasticity of aluminum silicon,” Light Metals, TMS, Las Vegas, pp. 879-882 (1995).

Brodova I., Polenz I., Bashlikov D., “The formation mechanism of ultradispersed phases in rapidly solidified aluminum alloys,” Nanostructured materials.V.6, No. 1-4, pp. 477-479 (1995).

I.G. Brodova, D.V. Bashlikov, I.V. Polents, O.A. Chikova, “Influence of heat time melt treatment on the properties of rapidly solidified aluminum alloys with transition metals,” Materials Science and Engineering (1997).

Дата добавления: 2015-07-20