| Autor: |
Lee JC; Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea., Son HW; Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea., Kim SW; Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea., Cho CH; Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea., Kim YJ; Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea., Kim JK; Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea., Hyun SK; Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea. |
| Abstrakt: |
The workability of Al- x Mg alloys with a high Mg content (Al-6Mg, Al-8Mg, Al-9Mg) was evaluated by investigating the microstructure and processing map. Hot torsion tests were conducted in the range of 350-500 °C between 0.1 and 1 s -1 . Constitutive equations were derived from various effective stress-strain curves, and the thermal activation energies for deformation obtained were 171 kJ/mol at Al-6Mg, 195 kJ/mol at Al-8Mg, and 220 kJ/mol at Al-9Mg. In the case of the processing map, the instability region, which widened with increasing Mg content, was due mainly to the influence of the Mg solute, which activated grain boundary cracking and flow localization. |
