Gradient Structure of Ti-55531 with Nano-ultrafine Grains Fabricated by Simulation and Suction Casting
Source abstract
Abstract
Optimizing the casting parameters of Ti-55531 is crucial in large aircraft castings. The thermodynamics parameters were simulated using the ProCAST software, and the properties of a gradient structure alloy with ultrafine microstructure were studied. The results indicate that the gradient structure of Ti-55531 with ultrafine grains is obtained. From the edge to the center, the gradient cooling rate decreases gradually from 88.83 to 52.79 °C/s and then to 37.51 °C/s as shown by the simulated parameters, resulting in the rapid solidification of the edge area to form the ultrafine grains. The hardness tends to strengthen with increasing radius in a gradient, from 3.67 ± 0.12 GPa at the center, gradually increasing to 3.79 ± 0.07 GPa at radius R1500, and finally reaching a maximum of 4.12 ± 0.33 GPa due to the nano-ultrafine grains at radius R3000. A gradient structure can increase the strength-ductility of the Ti-55531 alloy. The compressive strength and strain are 3118 MPa and 69%, which are 36 and 30% higher compared to the non-gradient alloy. This study provides a new method for preparing gradient structures. Melting temperature of the arc melting can be calculated with (, T , = 1520.56 + 0.28 imes I).
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Research context
OpenAlex topics: Titanium Alloys Microstructure and Properties · Advanced materials and composites · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
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