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Investigation on surface micro-crack evaluation of engineering ceramics by rotary ultrasonic grinding machining

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Abstract

Rotary ultrasonic grinding machining (RUGM) is regarded as the most powerful machining method for engineering ceramic. However, there are micro-cracks on the machined surface inevitably for lower fracture roughness of material. As part of surface integrity, effective parameter and unified criterion are not proposed for micro-crack evaluation. In the paper, surface micro-crack evaluation of engineering ceramics by RUGM was investigated. Micro-crack generation area ratio calculation model and information dimension calculation model were established. On the basis of those, a new evaluation parameter, called micro-crack fractal density, was proposed to reveal the characteristics of micro-crack. The parameter was proved to evaluate micro-crack evolution rule effectively with the advantages of statistics and multi-scale. Meanwhile, the factors affecting micro-crack fractal density evaluation were investigated. It is found that the micro-crack fractal density increases with cutting force rising, while it decreases as fracture toughness rises. The results provide the support for surface integrity evaluation of engineering ceramics.

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Authors and Affiliations

  1. Harbin Engineering University, Harbin, China

    Wei Shiliang & Zhao Hong

  2. Tsinghua University, Beijing, China

    Jing Juntao

  3. China Aerospace Science & Industry Corp Harbin Fenghua CO.LTD, Harbin, China

    Liu Yunfeng

Authors
  1. Wei Shiliang
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  2. Zhao Hong
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  3. Jing Juntao
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  4. Liu Yunfeng
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Correspondence to Zhao Hong.

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Shiliang, W., Hong, Z., Juntao, J. et al. Investigation on surface micro-crack evaluation of engineering ceramics by rotary ultrasonic grinding machining. Int J Adv Manuf Technol 81, 483–492 (2015). https://doi.org/10.1007/s00170-015-7195-y

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  • DOI: https://doi.org/10.1007/s00170-015-7195-y

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