Effects of Gd on the microstructure and mechanical properties of Mg–Li dual-phase alloys
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Abstract
Gadolinium (Gd) (up to 10 wt.%) was added to Mg-7Li dual-phase alloys, and the Gd-containing alloys were heat-treated for 3 h at 698 -748 K. The microstructure and mechanical properties of the as-cast and heat-treated alloys were then examined. The results indicated that the addition of Gd introduced the Mg3Gd phase into the duplex Mg-7Li alloy, containing a-Mg and b-Li phases. Gd also refined the grains, and the addition of 8 wt.% Gd resulted in the highest grain refining effect. The Gd atoms in the a-Mg phase, as well as precipitates in b-Li matrixes and at the surface of the a-Mg phase, strengthened the alloys. The highest strength alloy was obtained after the addition of 6 wt.% Gd, with tensile and compressive yield strengths of 143- 147 MPa, about twice as those of the Mg-7Li alloy. Heat treatment, which was found to be optimum at 723 K for 3 h, can decrease both the amount of precipitate and the hardness of the alloy, but not the amount of the Mg3Gd phase.
© 2020 by Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- CONTENTS
- Original Contributions
- Experimental investigation of slag/matte/metal/ tridymite equilibria in the Cu–Fe–O–S–Si system at 1473 K (1200°C), 1523 K (1250°C) and 1573 K (1300°C)
- Phase relations of the Ce2Co17–Sm2Co17 pseudo-binary system
- Effect of the matrix structure on vermicular graphite cast iron properties
- Preparation of heavy-section ductile iron with improved mechanical properties through quenching and tempering
- Investigating the local deformation and transformation behavior of sintered X3CrMnNi16-7-6 TRIP steel using a calibrated crystal plasticity-based numerical simulation model
- Effect on corrosion resistance of microstructure of 316L austenitic stainless steel subjected to combined torsion–tension deformation
- Effect of different reinforcement on the microstructure and mechanical properties of AA2024-based metal matrix nanocomposites
- Effect of joining temperature on Al2024/Ag/Ti-6Al-4V joints during transient liquid phase bonding
- Effects of Gd on the microstructure and mechanical properties of Mg–Li dual-phase alloys
- Critical assessment of CuZn39Pb2 processing maps
- Notifications
- DGM
- CONFERENCES
- Imprint
Artikel in diesem Heft
- CONTENTS
- Original Contributions
- Experimental investigation of slag/matte/metal/ tridymite equilibria in the Cu–Fe–O–S–Si system at 1473 K (1200°C), 1523 K (1250°C) and 1573 K (1300°C)
- Phase relations of the Ce2Co17–Sm2Co17 pseudo-binary system
- Effect of the matrix structure on vermicular graphite cast iron properties
- Preparation of heavy-section ductile iron with improved mechanical properties through quenching and tempering
- Investigating the local deformation and transformation behavior of sintered X3CrMnNi16-7-6 TRIP steel using a calibrated crystal plasticity-based numerical simulation model
- Effect on corrosion resistance of microstructure of 316L austenitic stainless steel subjected to combined torsion–tension deformation
- Effect of different reinforcement on the microstructure and mechanical properties of AA2024-based metal matrix nanocomposites
- Effect of joining temperature on Al2024/Ag/Ti-6Al-4V joints during transient liquid phase bonding
- Effects of Gd on the microstructure and mechanical properties of Mg–Li dual-phase alloys
- Critical assessment of CuZn39Pb2 processing maps
- Notifications
- DGM
- CONFERENCES
- Imprint
