S.N. Patankar

Processing of yttrium–aluminum garnets under non-equilibrium conditions

Abstract Polycrystalline yttrium–aluminum garnet (YAG) was processed via mechanical alloying (MA). The powder mixture comprising equal proportions of elemental aluminum and yttria was mechanically alloyed (MA’d) for 5 h and the MA’d powder mixture was heat treated. While MA resulted in aluminum–yttrium solid solution, the reaction leading to the formation of YAG occurs during the subsequent heat treatment of the powder mixture.

Superplastic Behavior Of Fine Grained Ti-6Al-4V

addition, these alloys, as compared with traditional alloys, possess not only higher strength but also increased modulus of elasticity E, which is a very important consideration in some cases. The MEM technology, with a discrete magnetohydrodynamic refining of the crystalline structure of ingot, purification and increase in homogeneity of its metal, develops the advantages oftitanium alloys with intermetallic strengthening. In summary: 1) A MEM technology for discrete external magnetic fields with cyclically repeated magneto-hydrodynamic shocks along the ingot crystallization front has been developed. 2) The MEM technology for discrete external magnetic fields guarantees a fine-crystalline structure of cast metal, close to a forging. In addition, the cyclic hydrodynamic shocks in molten metal pool guarantees a high purity and homogeneity of the ingot. 3) MEM with a cyclic magnetohydrodynamic action on the molten melt allows the production of heat-resistant alloys with an intermetallic type of strengthening, guaranteeing a strength of 330-400 Mpa with a heat resistance up to 750-800oC.

Extension Of Solid Solubility In Binary Ti-Sc System

Figure 4 The layout of equipment multiple-pass rolling mill. 1two-high break-down push stand; 2roll fittings; 3stands of multiple-pass rolling for fonning of billets; 4 tum over rollers; 5device of push rollers; 6guiding device; 7milling machine; 8follow-up rollers; 9fini shing sizing stand; I 0thennos-accumulator; 11processing roll-table; 12dri ving device; 13rotary flying shears; 14device for harvesting the crops; 15processing and packaging roll-tables; 16device for water cooling; 17roll-tables and driving device for return of the billets in main line of the mill.