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http://dx.doi.org/10.3740/MRSK.2020.30.6.308

Microstructure and Mechanical Properties of an AA1070 Wire Severely Deformed by Drawing Process  

Jeong, Dae-Han (Department of Advanced Materials Science and Engineering, Mokpo National University)
Lee, Seong-Hee (Department of Advanced Materials Science and Engineering, Mokpo National University)
Publication Information
Korean Journal of Materials Research / v.30, no.6, 2020 , pp. 308-314 More about this Journal
Abstract
A commercial AA1070 alloy for electrical wire is severely deformed by drawing process in which a rod with an initial diameter of 9mm into is reduced to a wire of 2mm diameter. The drawn AA1070 wire is then annealed at various temperatures from 200 to 450 ℃ for 2h. Changes in microstructure, mechanical properties and electrical properties of the specimens with annealing temperature are investigated in detail. The specimen begins partially to recrystallize at 250 ℃; above 300 ℃ it is covered with equiaxed recrystallized grains over all regions. Fiber textures of {110}<111> and {112}<111> components are mainly developed, and {110}<001> texture is partially developed as well. The tensile strength tends to decrease with annealing temperature due to the occurrence of recovery or/and recrystallization. On the other hand, the elongation of the annealed wire increases with the annealing temperature, and reaches a maximum value of 33.3 % at 300 ℃. Electric conductivity of the specimens increases with annealing temperature, and reaches a maximum value of 62.6 %IACS after annealing at 450 ℃. These results are discussed in comparison with those for the other aluminum alloy.
Keywords
cold drawing; pure aluminum; mechanical properties; microstructure; electrical properties;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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