Microstructure Evolution And Property Optimization Of TA10 Titanium Alloy Hot-rolled Sheet

In extreme service environments such as petrochemical, shipbuilding, nuclear power engineering and marine environments, materials are faced with multiple challenges such as high temperature, high pressure and strong corrosion, which put forward high requirements on the comprehensive performance of materials, especially corrosion resistance. Titanium and titanium alloys stand out for their low density, high strength, high toughness and excellent corrosion resistance, and have become key materials in these fields. However, the corrosion resistance of titanium alloys under certain conditions, such as resistance to corrosion by reducing acids and crevice corrosion, still needs to be improved. For this reason, TA10 titanium alloy (Ti-0.3Mo-0.8Ni) has been developed, which is free of rare metals, has excellent processability, and has excellent resistance to reducing acids, high-temperature chloride corrosion, and crevice corrosion, and is widely used in a number of important fields.
Despite the many advantages of TA10 titanium alloy, its high cost is still the main factor restricting its wide application. This is mainly due to the high cost of titanium sponge raw materials, the complexity of the multiple vacuum melting process, and the long processing flow. In order to reduce the cost and improve the production efficiency, the use of electron beam melting combined with hot rolling technology to prepare TA10 titanium alloy strip coils has become an innovative production process. This process not only significantly shortens the processing flow, but also increases the yield and reduces the overall cost.

Recently, Shenyang University of Technology and the Chinese Academy of Sciences Institute of Metals and Yunnan Titanium Industry research team in the "special casting and non-ferrous alloys" journal published the latest research results, an in-depth discussion of 930 ℃ hot rolling on the TA10 titanium alloy plate microstructure and room temperature mechanical properties of the impact. The study shows that the hot rolling process effectively refines the microstructure of TA10 titanium alloy, forming a complex structure composed of α matrix, Ti2Ni particles at grain boundaries and fine β-phase particles diffusely distributed within the α matrix. This microstructure feature not only enhances the corrosion resistance of the material, but also makes its mechanical properties show strong anisotropy, especially in the transverse direction, Young's modulus, yield strength and tensile strength are better than the rolling direction.
Overview of the research methodology:
Material preparation: the Ti-0.3Mo-0.8Ni alloy slabs were melted in an electron beam cold bed furnace, followed by anti-oxidation treatment and preheating to 930°C for holding, and finally rolled into plates with a thickness of 3 mm by a 1450 mm hot rolling mill.
Microstructure analysis: Using metallurgical microscope, scanning electron microscope and transmission electron microscope, combined with EDS elemental analysis, the microstructure of the cast and rolled plates were observed and analyzed in detail.
Mechanical properties testing: Prepare tensile specimens according to standard methods, and test the mechanical properties at room temperature on the electronic tensile testing machine, including yield strength, tensile strength and other key indicators.
Highlights of the research results:
The hot rolling process significantly improves the microstructure of TA10 titanium alloy, refines the grains and promotes the diffuse distribution of β-phase particles.
The rolled sheet has excellent transverse mechanical properties, which provides strong support for the application of the material in different directions.
The study reveals the intrinsic connection between microstructure and mechanical properties, which provides a scientific basis for further optimization and application of TA10 titanium alloy.
In summary, the study of microstructure evolution and property optimization of TA10 titanium alloy hot-rolled sheet not only provides a new idea for the low-cost and high-efficiency preparation of titanium alloy materials, but also lays a solid foundation for the improvement of the comprehensive performance of the material in the extreme service environment.