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Volume 33 Issue 5
Sep 2019
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Chinese Journal of High Pressure Physics  > 2019  >  33(5): 054201.
WAN Yin, WANG Huanran, CHU Guangxiang, REN Chunying. Spall Strength and Fracture Mechanism of Sintered Nd-Fe-B[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 054201. doi: 10.11858/gywlxb.20190746
Citation: WAN Yin, WANG Huanran, CHU Guangxiang, REN Chunying. Spall Strength and Fracture Mechanism of Sintered Nd-Fe-B[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 054201. doi: 10.11858/gywlxb.20190746
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Spall Strength and Fracture Mechanism of Sintered Nd-Fe-B

doi: 10.11858/gywlxb.20190746

  • Key Laboratory of Impact and Engineering of Ministry of Education, Ningbo University, Ningbo 315211, China

  • Received Date: 25 Mar 2019
  • Rev Recd Date: 22 Apr 2019
    Abstract
  • The plate impact experiment was carried out through use of one-stage gas gun platform to study the spall of sintered Nd-Fe-B magnet subjected to one-dimensional loading. The free-surface velocity profile was measured using fiber velocity interferometer system for any reflector, and the spall strength was determined. The main results show that spall strength increases and then decreases when the impact stress increases from 0.377 GPa to 2.512 GPa. The reason is attributed to compression damage of the material when the impacted stress exceeds a stress threshold. Furthermore, the fractured morphology of sinter Nd-Fe-B was analyzed by scanning electron microscopy and the transgranular fracture was observed.

     

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