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Metallurgical Transactions A

, Volume 18, Issue 7, pp 1191–1194 | Cite as

The precipitation sequence of Ni3Ti in Co-free maraging steel

  • D. M. Vanderwalker
Transformations

Abstract

TEM, microdiffraction, and X-ray microanalysis were used to study the precipitation processes in Co-free maraging steel. Austenite crystals were found to nucleate in the martensite matrix as the first step in the precipitation sequence of Ni3Ti. The austenite reversion is a result of Ni segregation. Ni3Ti nucleates in the austenite. The shape and orientation of Ni3Ti is determined by the austenite precursor. The same sequence occurs for heterogeneous nucleation on dislocations and grain boundaries. At the later stages of growth Mo is incorporated in the Ni3Ti lattice.

Keywords

Austenite Martensite Metallurgical Transaction Maraging Steel Martensite Lath 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Metallurgical of Society of AIME 1987

Authors and Affiliations

  • D. M. Vanderwalker
    • 1
  1. 1.Army Materials Technology LaboratoryWatertown

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