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Effect of isothermal homogenization on microstructure and mechanical properties of the Mg–5Y–4Gd–0.5Zn–0.4Zr alloy
Highlights More content of LPSO led to refined structure via DRX. More content of LPSO led to weak textures. More content of LPSO resulted in unobvious ageing response.
Abstract The microstructure and mechanical properties of the Mg–5Y–4Gd–0.5Zn–0.4Zr alloy have been investigated. The results suggested that the 14H long periodic stacking ordered (LPSO) structure was formed during isothermal homogenization. Furthermore, the presence of the 14H LPSO structure resulted in refined microstructure and weak texture while harmful to improve ageing hardening response after hot extrusion. The Mg–5Y–4Gd–0.5Zn–0.4Zr alloy after homogenization for 16h at 500°C (as-extruded alloy B) followed by subsequent hot extrusion displayed the highest peak hardness value during ageing at 220°C. The yield tensile strength and the ultimate tensile strength of the peak-aged alloy B were about 300MPa and 370MPa, respectively.
Effect of isothermal homogenization on microstructure and mechanical properties of the Mg–5Y–4Gd–0.5Zn–0.4Zr alloy
Highlights More content of LPSO led to refined structure via DRX. More content of LPSO led to weak textures. More content of LPSO resulted in unobvious ageing response.
Abstract The microstructure and mechanical properties of the Mg–5Y–4Gd–0.5Zn–0.4Zr alloy have been investigated. The results suggested that the 14H long periodic stacking ordered (LPSO) structure was formed during isothermal homogenization. Furthermore, the presence of the 14H LPSO structure resulted in refined microstructure and weak texture while harmful to improve ageing hardening response after hot extrusion. The Mg–5Y–4Gd–0.5Zn–0.4Zr alloy after homogenization for 16h at 500°C (as-extruded alloy B) followed by subsequent hot extrusion displayed the highest peak hardness value during ageing at 220°C. The yield tensile strength and the ultimate tensile strength of the peak-aged alloy B were about 300MPa and 370MPa, respectively.
Effect of isothermal homogenization on microstructure and mechanical properties of the Mg–5Y–4Gd–0.5Zn–0.4Zr alloy
Liu, Ke (author) / Wang, Xudong (author) / Wen, Kai (author)
2013-06-21
8 pages
Article (Journal)
Electronic Resource
English
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