Journal
PHILOSOPHICAL MAGAZINE
Volume 91, Issue 36, Pages 4594-4605Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2011.615350
Keywords
nanocrystalline; nanoindentation; nickel; nickel-iron alloy; hardness; Young's modulus; grain size; texture
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada
- Ontario Graduate Scholarship
- Ontario Research Fund (ORF-RE)
Ask authors/readers for more resources
Hardness and Young's modulus were measured by nanoindentation on a series of electrodeposited nanocrystalline nickel and nickel-iron alloys. Hardness values showed a transition from regular to inverse Hall-Petch behaviour, consistent with previous studies. There was no significant influence of grain size on the Young's modulus of nanocrystalline nickel and nickel-iron alloys with grain sizes greater than 20nm. The Young's modulus values for nanocrystalline nickel and nickel-iron alloys for grain sizes less than 20nm were slightly reduced when compared to their conventional (randomly oriented) polycrystalline counterparts. The observed trend with decreasing grain size was found to be consistent with composite model predictions that consider the influence of intercrystalline defects. However, there was some notable variability of the measured values when compared to the model predictions. Three theoretical relationships were used to characterise the anisotropic elastic behaviour of these materials. As a result, texture was also considered to have an influence on the measured Young's modulus and used to explain some of the observed variability for the entire grain size range (9.8-81 nm).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available