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Abstract

Effects of copper and other alloying elements on precipitation of secondary phases were studied in conventional wrought SAP 2507 and powder metallurgical (P/M-HIP) DUP 27 super duplex stainless steels. Copper-rich precipitates were found in copper-alloyed DUP 27 grade after aging treatments. The size of precipitates increases with increasing aging temperature. No evidence was found on the influence of the copper particles on the nucleation of secondary phases or the facilitation of their precipitation. No significant effects of the different production technologies (P/M and wrought) was found. The amount and the kinetics of the secondary phase precipitation depend mostly on the chemical composition of the steel.

Additional information

Authors: SMUK O, IRC-IAM, Ispra (IT);HANNINEN H, IRC-IAM, Ispra (IT);LUMATAINEN J, IRC-IAM, Ispra (IT)
Bibliographic Reference: Oral Report delivered at: Euromat 2000 Conference on Advances in Mechanical Behaviour, Plasticity and Damage, Hosted at: Tours (FR) 7-9 November 2000
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