Metal Science and Heat Treatment

, Volume 11, Issue 8, pp 668–672 | Cite as

Recrystallization of heterophase alloys

  • V. Yu. Novikov
From Foreign Technology
  • 23 Downloads

Conclusions

  1. 1.

    A dispersed second phase changes the recrystallization process in alloys, the distance between the particles being the controlling factor.

     
  2. 2.

    Large particles with relatively large distances between them accelerate the formation of recrystallization nuclei, causing an uneven distribution of dislocations in the deformed material and creating dislocation sinks during annealing.

     
  3. 3.

    Dispersed precipitates with small (<1–2 μ) distances between particles slow down recrystallization and permit retention of a considerably larger portion of cold hardening during heating to high temperatures.

     
  4. 4.

    Fine particles of second phase existing in the metal before deformation slow down the formation of a cellular structure during deformation, broadening the cell walls, and leading to cells with small misorientation. This inhibits the formation of subgrains and their growth during annealing.

     
  5. 5.

    Particles of second phase existing in the subgrain boundaries slow down their growth and retard the formation of recrystallization nuclei.

     
  6. 6.

    Coalescence or solution of particles of second phase can induce accelerated growth of subgrains, formation of recrystallization nuclei and subsequent softening, with slow recovery in the deformed matrix.

     
  7. 7.

    Coherent precipitates of second phase slow down recrystallization, inhibiting the rearrangement of dislocations and the movement of the boundaries of growing grains.

     
  8. 8.

    Segregates in the boundaries of deformed grains and subgrains formed during annealing of deformed supersaturated solid solutions also slow down recrystallization. In this case the recrystallization texture also changes as the result of the difference in the holding of subgrain boundaries with different orientations.

     

Keywords

Solid Solution Recrystallization Large Particle Fine Particle Large Distance 

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Copyright information

© Consultants Bureau 1970

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  • V. Yu. Novikov

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