Influence of shot peening velocity on surface modification effect induced by shot peening based on analysis of particle collision behavior

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  • 粒子衝突解析に基づいたショットピーニングの表面改質効果に及ぼす飛翔速度の影響評価
  • リュウシ ショウトツ カイセキ ニ モトズイタ ショットピーニング ノ ヒョウメン カイシツ コウカ ニ オヨボス ヒショウソクド ノ エイキョウ ヒョウカ

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Fine particle peening was examined about the effective factor to modification of metal microstructure as compared with conventional shot peening. Specifically, collision simulation was performed by the finite-element method based on the particle flight velocity measured with a high-speed camera. The influence of particle flight velocity on plastic deformation of the matrix in shot peening was examined. The results indicated that the plastic strain of the matrix on particle collision was not related to the size of particles, but showed an increasing tendency with increasing particle flight velocity. These observations indicated that the flight velocity of particles is an important factor governing plastic strain of the matrix. Moreover, the total plastic deformation energy around a plastic deformation range tended to increase with smaller particle size.

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