| Customization: | Available |
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| Certification: | ISO |
| Shape: | Block |
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Magnesium gadolinium alloy
MgGd20 alloy
MgGd25 alloy
MgGd30 alloy
Microstructure and mechanical properties of Magnesium gadolinium alloy treated by different processes
The microstructure and mechanical properties of as-cast Mg-9Gd magnesium alloy were studied by different heat treatments after extrusion deformation. The results show that the microstructure of the extruded Mg-9Gd alloy is composed of a large number of fine equiaxed grains and a small amount of mesophase, which are broken into a large number of fine massive particles and distributed in a zonal pattern parallel to the stress direction. Compared with the as-cast alloy, alloy extrusion state of sigma _b increased by 89.8%, sigma _ (0.2) increased by 44.1%, the delta reached 19.5%; Squeezed state alloy 200 ºC 520 ºC by 2 h + x 8 h after processing, the strength and plasticity, sigma _b, sigma _ (0.2) were 231.4, 129.3 MPa, the delta is 15.2%; After being treated at 200ºC×14 h, the strength of the extruded alloy increases obviously,σ_b and σ_(0.2) reach 254.2 MPa and 180.3 MPa respectively, but the ductility decreases further,δ is 10.5%.
Solidification structure analysis and simulation of magnesium gadolinium alloy
The macrostructure, microstructure and second phase of magnesium gadolinium alloys with Gd content of 0,3.83%,5.81% and 9.76% were studied. The conventional solidification structure of magnesium gadolinium alloy consists of α-Mg solid solution and Mg5Gd second phase. With the increase of rare earth Gd content and grain refinement, the distribution state and quantity of the second phase Mg5Gd also change. When the Gd content is 3.83%, the second phase is mostly distributed in granular or short rod-like shape independently in the product boundary. With the increase of Gd content to 9.76%, the volume fraction of the second phase increases, showing an isolated eutectic structure. The 3D-CAFE model was used to simulate the proportion of the central equiaxed crystal region of Mg-5.81%Gd, which is consistent with the experimental results. The simulation results show that with the increase of Gd content from 3.83% to 9.76%, the grain is refined, the columnar crystal region is reduced, and the central equiaxed crystal region is increased.
The invention relates to a method for preparing high strength cast magnesium gadolinium alloy containing Sc
The invention relates to a method for preparing high strength cast magnesium gadolinium alloy containing Sc, which belongs to the technical field of magnesium gadolinium alloy preparation, and solves the technical problem of poor plastic toughness of magnesium gadolinium alloy in the prior art. The invention can significantly inhibit the growth of alloy grains at a higher temperature by adding a small amount of Sc and Zr elements in combination, and is homogenized at 520525ºC for 69h, so as to achieve the Mg In particular, it can effectively promote the growth of the strengthening phase GdSc phase in the matrix and grain of MgGdNdScZr alloy, so as to improve the comprehensive mechanical properties. The tensile strength, yield strength and elongation of the cast magnesium alloy are up to 337MPa, 212MPa and 6.5%. The purity of the product is 99.5%.
Microstructure and mechanical properties of forged magnesium gadolinium alloys
In this paper, Mg-5.6Gd-0.6Y-0.4Nd-0.2Zn-0.2Zr alloy was prepared by metal mold casting and forged. The microstructure and mechanical properties of the alloy after solid solution, forging and aging treatment were studied. The influence of deformation processing on the microstructure and mechanical properties of the alloy and the strengthening mechanism of the alloy were discussed. The results show that the bulk of the second phase compounds are distributed along the dendrite boundary in the solid solution alloy. After deformation processing, the compound phase is broken into small pieces, which are dispersed in the matrix in the shape of small particles, and the grain size becomes uniform. Tensile test shows that the tensile strength and yield strength of the alloy are obviously improved after deformation processing. After aging treatment at 180ºC, the alloy showed good aging hardening behavior and reached the peak hardness at 72 h. The tensile properties of the alloy in peak aging state were tested. The ultimate tensile strength at room temperature was 275 MPa, the yield strength was 181MPa, and the ultimate tensile strength at 300ºC was 209 MPa and 127 MPa. The analysis shows that the good mechanical properties of the deformed alloy are related to the fine microstructure of the alloy and the precipitated phase dispersed in the matrix.
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