Author:
Jakob S.,Hörnqvist Colliander M.,Kawser J.,Rashidi S.,Ooi S. W.,Thuvander M.
Abstract
AbstractThe investigated steel is hardened by precipitation of both intermetallic β-NiAl particles and carbides. Around peak hardness, here reached after aging at 520 °C for 6 h, the number density of β-NiAl particles is 2.4 × 1024 and 4.4 × 1023 for carbides, respectively. The carbides and β-NiAl often form co-precipitates with presumably the carbides nucleating on the β-NiAl precipitates. The secondary carbides are mainly of the Cr-rich M23C6 type in the investigated states. The steel has a good resistance against over-aging, whereby the β-NiAl coarsen considerably slower than the carbides.
Funder
Chalmers University of Technology
Publisher
Springer Science and Business Media LLC
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