Investigation on Dynamic Compressive Properties of Carbon Fiber Cloth-Reinforced Titanium Alloy

作者：Teng Wu, Jin Xu Liu, Shu Kui Li, Qiu Rong Yang · 发表于：Advanced materials research · 年份：2013 · DOI：10.4028/www.scientific.net/amr.815.221 · 被引用次数：1 · 研究领域：Metal and Thin Film Mechanics、Advanced ceramic materials synthesis、Aluminum Alloys Composites Properties

Cu-coated carbon fiber cloth/Ti-6Al-4V composite (Cu-C f /TC4) and uncoated-C f /TC4 were fabricated by spark plasma sintering (SPS) method. The microstructure and dynamic compression properties of the C f /TC4 composites were investigated. Results show that the matrix-fiber interfacial bonging in uncoated-C f /TC4 is weaker than in Cu-C f /TC4. Moreover, lamellar TiC exists throughout the TC4 matrix in uncoated-C f /TC4, while there is no TiC generated in TC4 matrix of Cu-C f /TC4. Dynamic compressive tests indicate the stress-strain curves of Cu-C f /TC4 and uncoated-C f /TC4 show no difference at a strain rate of 2500 s -1 , while show significant difference at a strain rate of 4800 s -1 . Further investigations find: (1) at a strain rate of 2500 s -1 , the reinforcement effect of C f on Cu-C f /TC4 is similar to TiC on uncoated-C f /TC4, explaining the exact similarity in compressive property of Cu-C f /TC4 and uncoated-C f /TC4; (2) at a strain rate of 4800 s -1 the reinforcement effect of C f on Cu-C f /TC4 is far more than TiC on uncoated-C f /TC4, explaining the higher compressive strength of Cu-C f /TC4; moreover, multiple debonding of carbon fiber and its squeezing into TC4 matrix constitute an important energy absorption mechanism for uncoated-C f /TC4, explaining the better plasticity of uncoated-C f /TC4.