Copper precipitation in cobalt-alloyed precipitation-hardened stainless steel

Copper precipitation in cobalt-alloyed precipitation-hardened stainless steel

The influence of cobalt addition on precipitation of copper in a high-strength stainless steel was investigated using three-dimensional atom probe tomography. A decrease in copper precipitate size with narrowed distribution was observed in cobalt-containing steel. The concentration profile across th...

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Bibliographic Details
Published in:Scripta materialia Vol. 66; no. 11; pp. 943 - 946
Main Authors: Murthy, Arpana S., Medvedeva, Julia E., Isheim, Dieter, Lekakh, Simon L., Richards, Von L., Van Aken, David C.
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-06-2012
Subjects:
3DAP
Casting
First-principle electron theory
Precipitation
Stainless steels
3DAP
Casting
Precipitation
First-principle electron theory
Stainless steels
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Summary:The influence of cobalt addition on precipitation of copper in a high-strength stainless steel was investigated using three-dimensional atom probe tomography. A decrease in copper precipitate size with narrowed distribution was observed in cobalt-containing steel. The concentration profile across the precipitate–matrix interface indicated rejection of cobalt atoms from the copper precipitates. This behavior was explained with first-principles calculations using energy-minimization criterion.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2012.02.039