The efficiency of thermomechanical processing was studied to optimize the mechanical properties of cast ternary and multicomponent hypoeutectic titanium-based alloys with silicide–boride reinforcement, produced by electron-beam crucible-skull melting. All the alloys studied exhibit low plasticity in cast state. High-temperature deformation, such as forging of samples heated to 1050°C in air, can significantly enhance the properties of the alloys: the plasticity of ternary Ti–Si–B alloys increases by four to six times (from 0.5 to 2–3%) and their fracture toughness increases by three times (from 11 to 36 MPa ∙ m0.5). The plasticity of the alloys with Zr, Al, and Sn additions increases by one order of magnitude (to 0.2–0.3%) and their fracture toughness by almost twice. The greatest high-temperature creep-rupture resistance at a fracture toughness of 26 MPa ∙ m0.5 is shown by the Ti80Zr1.2Al5.5Sn2.1Si8.7B2.5 alloy: 1038, 887, and 572 MPa at 600, 700, and 800°C, respectively.

中文翻译：

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高温变形对硅化物-硼化物增强原位钛复合材料物理和机械性能的影响

研究了热机械加工的效率，以优化通过电子束坩埚 - 头骨熔化生产的具有硅化物 - 硼化物增强的铸造三元和多组分亚共晶钛基合金的机械性能。所有研究的合金在铸造状态下都表现出低塑性。高温变形，例如在空气中加热到 1050°C 的样品锻造，可以显着提高合金的性能：三元 Ti-Si-B 合金的塑性增加 4-6 倍（从 0.5 到 2-3 %) 并且它们的断裂韧性增加了三倍（从 11 到 36 MPa ∙ m0.5）。添加了 Zr、Al 和 Sn 的合金的塑性增加了一个数量级（达到 0.2-0.3%），断裂韧性几乎增加了两倍。