SiC/Al複合材料の破壊過程におけるAE特性

概要

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The tensile test of SiC_<CVD>/Al composites and their component materials was carried out by detection of acoustic emission (AE) during deformation. The characteristic of AE in the fracture process was investigated in connection with the microfractures. The results obtained were as follows: when the fibers of the composite were broken, high-amplitude AE signals were generated and the frequency was about 0.2 MFHz. Both duration and oscillation count of the signal increased with increase of the amplitude. Therefore, both parameters are effective for evaluation of microfracture of the composites. The number of microfractures in composite decreased with increase of the fiber volume fraction to the maximum stress, that is, the fracture became noncumulative with increase of the fiber volume fraction.
一般社団法人日本機械学会の論文
1996-01-25