A volume increase associated with the internal nitriding of Ni-5 at.% Cr alloy at relatively low homologous temperatures and high nitrogen fugacities results in a stress gradient between the alloy surface and the precipitation front. Stress relief occurred mainly by transport of nickel (solvent) to the stress-free metal surface mediated by pipe diffusion-controlled creep. This mechanism is prevailing because of a high dislocation density developing within the parent Ni-matrix upon the precipitation of semi-coherent nitride particles. The CrN-precipitates was found to be topotactically oriented with respect to the matrix.
|Number of pages||4|
|Journal||Defect and Diffusion Forum|
|Publication status||Published - 2003|
- Internal precipitation
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics