メカニカルアロイング法により作製したＴｉＣ粒子強化チタンの機械的性質

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タイトル別名
  • Mechanical Properties of Mechanically Alloyed TiC Particulate-Reinforced Titanium.
  • メカニカル アロイングホウ ニ ヨリ サクセイシタ TiC リュウシ キョウカ

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Ti powder and TiC particles were blended by two methods of simple blending and mechanical alloying. Hot pressing was applied after the blending and mechanical properties of these Ti base composites with 0 to 20 mass % TiC were studied. Tensile strength of the simply blended composite showed a peak at 5 mass % TiC and it decreased by further adding of TiC. On the other hand, tensile strength of the mechanically alloyed composite increased with the content even above 5 mass % of TiC. Sharp decrease in elongation occurred at 3 mass % TiC, and elongation of the mechanically alloyed composite was always slightly larger than that of the simply blended composite. Young's modulus of the composite increased linearly with TiC content along with a rule of mixture. Debonding at the matrix/particle interface did not occur during tensile deformation, but relatively large TiC particles were observed to be cracked easily. Mechanical alloying is a useful method for the strengthening of Ti base composites with TiC particles, as the structure having small TiC particles of uniform dispersion is made by this method.

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