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New design aspects of creep-resistant NiAl-strengthened ferritic alloys

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Volume
68
Issue
6
Identifiers
DOI: 10.1016/j.scriptamat.2012.10.040
Keywords
  • Nial-Strengthened Ferritic Alloys
  • Creep Resistance
  • Ni2Tial
  • Low-Density Steels
  • Ultra-Supercritical Fossil-Energy Power Plants

Abstract

Abstract Ferritic alloys strengthened with NiAl precipitates are being developed for elevated-temperature applications. Due to the high concentration of Al in these alloys, they feature a relatively low density of ∼7gcm−3. In this paper, the high-temperature mechanical behavior of NiAl-strengthened ferritic alloys is reviewed. Further, we discuss another related class of alloys, where the precipitate strengthening is provided by Ni2TiAl-type precipitates rather than NiAl. These relatively unexplored alloys may enhance the creep resistance of precipitate-strengthened ferritic alloys.

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