Microstructural analysis of rapidly solidified aluminium-nickel alloys

Download
  1. (PDF, 539 KB)
  2. Get@NRC: Microstructural analysis of rapidly solidified aluminium-nickel alloys (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1179/1879139511Y.0000000006
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleCanadian Metallurgical Quarterly
Volume50
Issue3
Pages295302; # of pages: 8
AbstractPowders of Al-50 wt-%Ni and Al-36 wt-%Ni were produced using the impulse atomisation technique, a rapid solidification technique. The molten droplets were cooled in flight by the stagnant helium or nitrogen in the atomising chamber. The resulting powders were sieved into different size ranges. X-ray diffraction and neutron diffraction were used in order to quantify the phase fractions in the samples. Profile refinement, using the computer software GSAS, was used to calculate the weight fraction of the existing phases, namely Al3Ni2, Al3Ni and Al, as a result of different processing parameters. The Scheil-Gulliver model was applied to investigate the extent to which it can predict phase fractions in the Al-Ni system. In Al-50 wt-%Ni, by increasing cooling rate, the ratio of Al3Ni to Al3Ni2 approaches that of Scheil-Gulliver’s prediction. Opposite behaviour was observed in Al-36 wt-%Ni. In addition, from the profile refinement, the effect of composition and cooling rate on the lattice parameter of Al3Ni2 was investigated. In Al-36 wt-%Ni, the c/a ratio is significantly smaller than the stoichiometric c/a ratio of Al3Ni2, and it decreases with increasing cooling rate. On the other hand, for Al-50 wt-%Ni, the c/a ratio is much closer to the stoichiometric value and it increases with increasing cooling rate.
Publication date
PublisherManey Publishing
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number18708347
Export citationExport as RIS
Report a correctionReport a correction
Record identifier060904d3-d1a5-4a29-ae55-99af6f38e69d
Record created2011-11-10
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)