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
Online Access:	Get full text
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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