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研究了氢对典型组织的钛合金相变及高温热塑性的影响,结果表明:加氢可以显著降低α单相及(α+β)双相组织钛合金的α/β相转变温度,从而可明显增加钛合金在给定温度下显微组织中塑性β相的相对含量,有效提高钛合金的高温热塑性。从而提出了通过对基体加氢来实现降低钛基复合材料制备温度的思路,并在实验上实现了在低于正常制备温度50℃下完成SiC连续纤维增强Ti-1100基和Ti-6Al-4V基复合材料的热扩散连接制备,从而有效降低了复合材料中纤维/基体之间的界面反应程度,使反应层的厚度明显减小。
The effects of hydrogen on the phase transformation and high temperature thermoplasticity of typical titanium alloys were investigated. The results show that hydrogenation can significantly reduce the α / β phase transition temperatures of α-phase and (α + β) The relative content of plastic β phase in the microstructure of the alloy at a given temperature effectively improves the high temperature thermoplasticity of the titanium alloy. Thus, the idea of reducing the preparation temperature of Ti-based composites by hydrogenation of the matrix was proposed and experiments were successfully carried out to complete SiC continuous fiber reinforced Ti-1100 and Ti-6Al-4V at 50 ℃ below the normal preparation temperature Based composite material by thermal diffusion bonding, thereby effectively reducing the fiber / matrix interfacial reaction in the composite material and obviously reducing the thickness of the reaction layer.