Soviet Powder Metallurgy and Metal Ceramics

, Volume 18, Issue 10, pp 744–748 | Cite as

Characteristics of crack growth in sintered materials

  • L. A. Zheltonoga
  • I. P. Gabrielov
Test Methods and Properties of Materials

Conclusions

In sintered materials crack growth occurs as a rule through a mechanism of pore coalescence accompanying the rupture of interparticle (interpore) bridges, which in turn can rupture both through microvoid coalescence and transor intercrystallite cleavage. The rupture of a sintered material with a crack is linked not only with the attainment of peak stresses at the crack tip but also, and to an even greater extent, with the appearance of such stresses at the tips of other cracklike defects, i.e., pores. Unstable crack growth is due to the merging of microcracks formed at pores into a main crack.

Keywords

Peak Stress Main Crack Sintered Material Unstable Crack Unstable Crack Growth 

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Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • L. A. Zheltonoga
    • 1
  • I. P. Gabrielov
    • 1
  1. 1.Belorussian Polytechnic InstituteUSSR

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