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

作者：Sun Z; Liebscher C H; Huang S; Teng Z; Song G; Wang G; Asta M; Rawlings M; Fine M E; Liaw P K^*

来源：Scripta Materialia, 2013, 68(6): 384-388.

DOI：10.1016/j.scriptamat.2012.10.040

• NiAl-strengthened ferritic alloys
• Creep resistance
• Ni2TiAl
• Low-density steels
• Ultra-supercritical fossil-energy power plants

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 similar to 7 g cm(-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.

• 出版日期2013-3
• 单位西北大学