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首页> 外文期刊>Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology >Microstructural characterization and failure mechanism of vacuum plasma sprayed Ti-6Al-4V/B_4C composite
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Microstructural characterization and failure mechanism of vacuum plasma sprayed Ti-6Al-4V/B_4C composite

机译：真空等离子喷涂Ti-6Al-4V / B_4C复合材料的显微组织表征及破坏机理

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摘要

In the current study, metal-matrix composite of Ti-6Al-4V alloy reinforced by B_4C was produced by vacuum plasma spray (VPS) processing. Microstructural analyses were made by optical microscopy, scanning and transmission electron microscopy (SEM and TEM), and X-ray diffraction (XRD). Mechanical properties of the composite were examined using three-point bending test and Vickers microhardness. Room temperature mechanical properties of the as-sprayed Ti-6Al-4V alloy and composite showed an increase in the microhardness and flexural modulus and a decrease in the flexural strength. Failure of the composites occurred along reinforcement-matrix interfaces due to the presence of a high density of microcracks, pores, and weak interfaces between splats. Moreover, erosive mechanism behavior of the composite was studied and it was seen that both plastic deformation of the alloy and brittle fracture of B_4C phase had caused erosive wear in the composite.
机译：在当前的研究中，通过真空等离子喷涂（VPS）工艺制备了B_4C增强的Ti-6Al-4V合金的金属基复合材料。通过光学显微镜，扫描和透射电子显微镜（SEM和TEM）以及X射线衍射（XRD）进行微观结构分析。使用三点弯曲试验和维氏显微硬度检查了复合材料的机械性能。喷涂后的Ti-6Al-4V合金和复合材料的室温力学性能显示出显微硬度和弯曲模量的增加，以及弯曲强度的降低。由于存在高密度的微裂纹，小孔和薄板之间的薄弱界面，复合材料沿增强材料-基质界面发生破坏。此外，研究了复合材料的腐蚀机理，发现合金的塑性变形和B_4C相的脆性断裂均引起复合材料的腐蚀磨损。

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