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钛基合金微观组织复杂、与性能的关系尚不完全清楚,存在一些仅靠实验难以解决的矛盾,如钛铝金属间化合物具有良好的高温性能,但其室温塑性较低,制约其在航空发动机等领域的广泛应用;而对于医用植入合金和柔韧钛合金要求在低弹性模量条件下实现高强度。本研究针对航空发动机中应用的高温钛基合金和具有广泛应用前景的低模量多功能钛合金两类材料,充分利用信息化手段,特别是发挥超级计算的作用,通过集成电子、原子层次计算探索合金化对相变的影响、形变机制及其与变形条件的关系;借助相场动力学模拟结合热力学动力学数据库分析,揭示高温成形、热处理和使役过程中的微观组织演化动力学规律;借助有限元模拟轧辊孔型等因素对钛合金丝材成形工艺的影响,并通过实验研究加以验证,实现合金的计算辅助设计和多种性能及工艺的综合优化。
The relationship between the microstructure of titanium-based alloy and its properties is not fully understood. There are some contradictions that can not be solved by experiments. For example, titanium-aluminum intermetallics have good high-temperature properties, but their low plasticity at room temperature restricts their application in aero-engines And other fields widely used; and medical implantable alloys and flexible titanium alloy requirements in the low modulus of elasticity to achieve high strength. In this study, aero-engine applications of high-temperature titanium-based alloys and has broad prospects for the application of low-modulus multi-functional titanium alloy two types of materials, make full use of information technology, especially to play the role of supercomputing, integrated electronics, atomic level calculation Explores the effect of alloying on the phase transformation, the deformation mechanism and its relationship with the deformation conditions; with phase field dynamics simulation combined with thermodynamic kinetic database analysis reveals the microstructure evolution dynamics during high temperature forming, heat treatment and service; Finite element simulation roll pass and other factors on the forming process of titanium alloy wire, and verified by experimental research to achieve the alloy’s calculation of aided design and a variety of performance and process optimization.