期刊
SCRIPTA MATERIALIA
卷 66, 期 10, 页码 805-808出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2012.02.015
关键词
Ti2AlC; Tensile creep; High temperature; Power-law creep; Rupture
类别
资金
- DOE's Nuclear Energy University [CFP-09-790]
In the secondary regime of the tensile creep of Ti2AlC, made with commercial powders with a grain size of 14 +/- 8 mu m, the minimum creep rate is given by a power law, with a stress exponent of 2.5 +/- 0.3 and an activation energy of 362 +/- 83 kJ mol(-1). Dislocation creep-with possibly grain boundary sliding-are presumed to be the dominant creep mechanism(s). The high failure strains (>15%) can be partially attributed to substantial grain kinking near the fracture surface and concomitant damage tolerance. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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