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

被引：83
作者：
Sun, Z. [1 ]
Liebscher, C. H. [2 ,3 ]
Huang, S. [1 ]
Teng, Z. [1 ]
Song, G. [1 ]
Wang, G. [1 ]
Asta, M. [3 ]
Rawlings, M. [4 ]
Fine, M. E. [4 ]
Liaw, P. K. [1 ]
机构：
[1] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
[4] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
来源：
SCRIPTA MATERIALIA | 2013年 / 68卷 / 06期
关键词：
NiAl-strengthened ferritic alloys; Creep resistance; Ni2TiAl; Low-density steels; Ultra-supercritical fossil-energy power plants; PARTICULATE COMPOSITE-MATERIALS; HIGH-TEMPERATURE CREEP; IMPURITY DIFFUSIVITIES; MECHANICAL-PROPERTIES; INTERFACE DIFFUSION; NEUTRON-DIFFRACTION; CR ALLOYS; ALPHA-FE; AL; BEHAVIOR;
D O I：
10.1016/j.scriptamat.2012.10.040
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：384 / 388
页数：5
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