Influence of precipitate size and morphology on grain refinement in nickel aluminium bronze

Nickel aluminium bronze (NAB) was subjected to equal channel angular pressing (ECAP) using routes BA and C at 400°C to investigate the effect of precipitate size and morphology on grain refinement in low stacking fault energy alloys. Both routes produced dynamically recrystallised grains of ∼550 nm...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2015-08, Vol.89 (1), p.12018
Main Authors: Barr, C J, Xia, K
Format: Article
Language:English
Subjects:
Aluminium
Aluminum
Aluminum bronzes
Bronzes
Dynamic recrystallization
Equal channel angular pressing
Grain refinement
MORPHOLOGY
Nickel
PRECIPITATES
Precipitation
RECRYSTALLIZATION
Stacking fault energy
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Summary:Nickel aluminium bronze (NAB) was subjected to equal channel angular pressing (ECAP) using routes BA and C at 400°C to investigate the effect of precipitate size and morphology on grain refinement in low stacking fault energy alloys. Both routes produced dynamically recrystallised grains of ∼550 nm in size although only route BA was able to create a uniform distribution of the refined grains. The large unrefined regions in NAB processed via route C was thought to arise from its inability to redistribute the various precipitate phases, as recrystallisation was enhanced around the coarse κII rosettes and refined κIII lamellae but reduced in the areas containing fine κIV precipitates.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/89/1/012018