Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 657, Issue -, Pages 565-569Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.10.192
Keywords
Ni-Fe alloy; Tensile test; Transmission electron microscopy (TEM); Dislocation; Deformation
Categories
Funding
- National Natural Science Foundation of China [51401071]
- National Magnetic Confinement Fusion Program of China [2015GB121003]
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A low cost Ni-Fe-based superalloy due to its good mechanical properties and good workability has been evaluated as a promising candidate boiler material for advanced ultra-supercritical coal-fired power plants with temperature up to 700 degrees C. The major concerns with Ni-Fe-based alloys are the fundamental deformation mechanisms at intermediate temperatures. In this paper, great emphasis is placed on the dislocation configurations induced by tensile deformation in this low cost Ni-Fe-based superalloy. Two typical deformation-induced microstructure features, Orowan looping and precipitates shearing, are present during tensile deformation. Careful identification of dislocation-based deformation mechanisms by transmission electron microscopy was performed in tensile strained specimens at 20 degrees C, 500 degrees C, 650 degrees C, 700 degrees C and 750 degrees C in order to correlate the macroscopic behavior with the tension controlling mechanisms. (C) 2015 Elsevier B.V. All rights reserved.
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