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- 저자 : E. V. Nikolaev (검색결과 1 건)
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S. O. Rogachev,V. A. Andreev,V. S. Yusupov,S. A. Bondareva,V. M. Khatkevich,E. V. Nikolaev 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.4
The influence of a degree of strain by rotary forging, as well as post-deformation annealing on the structure and mechanicalproperties of a clad aluminum alloy/copper bimetallic material was studied. Rotary forging of the initial bimetallic billet wascarried out step by step from a diameter of 20.1 mm to a diameter of 2.4 mm. Rotary forging of the aluminum alloy/copperbimetallic material to a diameter of 5.3 mm leads to the formation of a mixed fine-grained and nanocrystalline orientedstructure in an aluminum shell and to a decrease in the average grain size by 4.5 times and to an increase in the density ofcrystalline defects in a copper core. A reduction in the aluminum alloy/copper bimetallic material diameter to 2.4 mm (withintermediate annealing) leads to the formation of a fine-grained elongated grain-subgrain oriented structure in the aluminumshell and to the formation of a mixed cellular and subgrain structure in a copper core. Rotary forging leads to a significantincrease in the strength of the aluminum alloy/copper bimetallic material and to a decrease in ductility. The optimal combinationof increased strength and satisfactory ductility provides post-deformation annealing.
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