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Microstructures and tensile properties of Mg–Gd–Y–Zr alloy during multidirectional forging at 773K
Highlights Rare earth (RE) containing Mg–Gd–Y–Zr alloy was successfully multidirectional forged for 8 passes without any cracks. Initial coarse grains was refined due to a combination of discontinuous and continuous dynamic recrystallization. The alloy MDFed after 6 passes exhibited an excellent balance of strength and ductility at room temperature.
Abstract A homogenized Mg–10Gd–4.8Y–0.6Zr (wt.%) alloy was subjected to multidirectional forging (MDF) at 773K. It was shown that the average grain size decreased with increasing cumulative strain till 6 passes. Uniform fine-grained structure with an average grain size of 9.3μm was achieved after 6 passes, i.e., cumulative strain of 1.8. Results revealed that grain refinement was induced by a complicated combination of discontinuous dynamic recrystallization at low strain regions and continuous dynamic recrystallization or rotation recrystallization at medium-to-high strain regions. The alloy multi-directionally forged (MDFed) for 6 passes exhibited an excellent balance of strength and ductility at room temperature with ultimate tensile strength (UTS) of 336MPa and elongation to fracture of 21.0%.
Microstructures and tensile properties of Mg–Gd–Y–Zr alloy during multidirectional forging at 773K
Highlights Rare earth (RE) containing Mg–Gd–Y–Zr alloy was successfully multidirectional forged for 8 passes without any cracks. Initial coarse grains was refined due to a combination of discontinuous and continuous dynamic recrystallization. The alloy MDFed after 6 passes exhibited an excellent balance of strength and ductility at room temperature.
Abstract A homogenized Mg–10Gd–4.8Y–0.6Zr (wt.%) alloy was subjected to multidirectional forging (MDF) at 773K. It was shown that the average grain size decreased with increasing cumulative strain till 6 passes. Uniform fine-grained structure with an average grain size of 9.3μm was achieved after 6 passes, i.e., cumulative strain of 1.8. Results revealed that grain refinement was induced by a complicated combination of discontinuous dynamic recrystallization at low strain regions and continuous dynamic recrystallization or rotation recrystallization at medium-to-high strain regions. The alloy multi-directionally forged (MDFed) for 6 passes exhibited an excellent balance of strength and ductility at room temperature with ultimate tensile strength (UTS) of 336MPa and elongation to fracture of 21.0%.
Microstructures and tensile properties of Mg–Gd–Y–Zr alloy during multidirectional forging at 773K
Tang, Liechong (Autor:in) / Liu, Chuming (Autor:in) / Chen, Zhiyong (Autor:in) / Ji, Dawei (Autor:in) / Xiao, Hongchao (Autor:in)
16.03.2013
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Microstructures and tensile properties of Mg-Gd-Y-Zr alloy during multidirectional forging at 773 K
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