Abstract
AbstractThe microchemical characterization of Inconel 706 and its modification DT 706 was studied after aging at 750 °C for 5000 h and 750 h, respectively. Characterization of the precipitates and the matrix was carried out by three‐dimensional atom probe and by transmission electron microscopy.The γ′‐ and γ″‐precipitates grow in DT 706 alloy after aging for 750 h. At this stage, the intragranular nucleation of the η‐phase also takes place. Decrease of Ti content in the γ′‐phase of about 4.5 at.% and decrease of Nb in the γ″‐phase of 4 at.% were measured and compared with the unaged Inconel 706. After 5000 h aging time, only the η‐plates remain in Inconel 706 embedded in the matrix. The volume fraction of the matrix increases up to 93% in comparison with the unaged alloy. Copyright © 2007 John Wiley & Sons, Ltd.
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