Journal article
Evolution of microstructure, texture and topography during additional annealing of cube-textured Ni–5at.%W substrate for coated conductors
Department of Energy Conversion and Storage, Technical University of Denmark1
Electrofunctional materials, Department of Energy Conversion and Storage, Technical University of Denmark2
Department of Wind Energy, Technical University of Denmark3
Materials science and characterization, Department of Wind Energy, Technical University of Denmark4
Microstructure, texture and topography have been studied in a recrystallized Ni–5at.%W substrate before and after additional annealing at 1025C for 1 h. The initial recrystallized material contained a strong cube texture and a high fraction of low angle grain boundaries. R3 boundaries were also frequent in this substrate, including both coherent and incoherent twin boundary segments as well as non-twin R3 boundaries formed between twins and non-matrix neighbors of the cube texture component.
A strong correlation between the boundary type and the average depth of grain boundary grooves was observed in this material. The smallest average groove depth was obtained for coherent twin boundaries, followed by low angle boundaries. Significantly greater average groove depths were found for the other boundary types.
A similar correlation was also observed between the boundary type and the average inclination angle of groove walls. The additional annealing resulted in grain growth, texture strengthening and an increase in the fraction of low angle boundaries. Also, changes were observed in the extent of thermal grooving studied in the same regions before and after the additional annealing.
Groove depths increased for a large number of stationary boundaries, whilst the majority of migrating boundaries developed shallower grooves compared to those before the additional annealing.
Language: | English |
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Year: | 2012 |
Pages: | 161-167 |
ISSN: | 18734669 and 09258388 |
Types: | Journal article |
DOI: | 10.1016/j.jallcom.2012.06.033 |
ORCIDs: | Wulff, Anders Christian , Mishin, Oleg and Grivel, Jean-Claude |