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Structure and mechanical characteristics of a layered composite material based on TiB/TiAl/Ti

机译:基于TiB/TiAl/Ti的层状复合材料的结构与力学特性

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摘要

In this work, a TiB/TiAl/alpha-Ti layered composite material has been obtained by unrestricted SHS compression using titanium, boron, and aluminum as the initial components. It has been found that combustion and subsequent high-temperature shear deformation (thermal and mechanical conditions of unrestricted SHS compression) results in composite ceramic (TiB/Ti) and intermetallic (TiAl, Ti3Al) macrolayers to be oriented along the direction of material flow and perpendicularly to the applied load. It is shown that the synthesis of the material proceeds according to the solid/liquid-phase mechanism. The mechanical characteristics of the obtained layered composite material have been studied, namely hardness, microhardness, and fracture toughness. The mechanism of crack propagation has been established and the dependence of the values of the stress intensity factor on the orientation of microvolumes in the material has been determined.
机译:在这项工作中,以钛、硼和铝为初始组分,通过无限制SHS压缩获得了TiB/TiAl/α-Ti层状复合材料。已经发现,燃烧和随后的高温剪切变形(不受限制的SHS压缩的热和机械条件)导致复合陶瓷(TiB/Ti)和金属间化合物(TiAl,Ti3Al)宏观层沿材料流动方向取向并垂直于施加的载荷。结果表明,该材料的合成是按照固/液相机理进行的。研究了所得到的层状复合材料的力学特性,即硬度、显微硬度和断裂韧性。已经建立了裂纹扩展的机理,并确定了应力强度因子值对材料中微体积取向的依赖性。

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