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以TC4钛合金箔(Ti-6Al-4V)作为强韧层,TiC-Ti-Al混合粉末作为复合层,采用放电等离子烧结技术(SPS)制备TC4/Ti_(n+1)AlC_n-TiAl叠层结构复合材料(n=1或2)。研究了TC4/TiAl基叠层复合材料组成、结构和力学性能。结果表明:叠层之间结合良好,随着强韧层数量和Ti_(n+1)AlC_n含量的增加,界面层厚度减小,裂纹在扩展过程中Y型分叉角增大,应力集中因子减小,材料的力学性能显著提升。当强韧层数为9层时,材料的抗弯强度和断裂韧性在Arrester受力方向上达到最大值,分别为(1419.28±70.96)MPa和(62.17±3.11)MPa·m~(1/2)。
The TC4 / Ti_ (n + 1) AlC_n-TiAl layer was prepared by spark plasma sintering (SPS) using TC4 titanium alloy foil (Ti-6Al-4V) as toughening layer and TiC-Ti-Al mixed powder as the composite layer Structural composites (n = 1 or 2). The composition, structure and mechanical properties of TC4 / TiAl-based laminated composites were studied. The results show that the bonding between the layers is good. With the increase of the number of toughening layers and the content of Ti_ (n + 1) AlC_n, the interfacial layer thickness decreases and the Y-shaped bifurcation angle increases during the crack growth. The stress concentration factor Reduce the mechanical properties of the material significantly improved. When the number of strong layers is 9, the flexural strength and fracture toughness of the material reach the maximum value in the direction of Arrester force, which are (1419.28 ± 70.96) MPa and (62.17 ± 3.11) MPa · m 1/2 ).