Abstract
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 °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 °C, 500 °C, 650 °C, 700 °C and 750 °C in order to correlate the macroscopic behavior with the tension controlling mechanisms.
Original language | English |
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Pages (from-to) | 565-569 |
Number of pages | 5 |
Journal | Journal of Alloys and Compounds |
Volume | 657 |
DOIs | |
Publication status | Published - 2016 Feb 5 |
Externally published | Yes |
Keywords
- Deformation
- Dislocation
- Ni-Fe alloy
- Tensile test
- Transmission electron microscopy (TEM)
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry