Decomposition behavior of yttria-stabilized zirconia and its effect on directed energy deposited Ti-based composite material

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 122
  • Download : 0
We report on the microstructure and the strengthening mechanisms of additively manufactured parts fabricated by directed energy deposition of Ti-6Al-4V (Ti64) powders blended with yttria-stabilized zirconia (YSZ) nanoparticles. These specimens showed refined microstructures as compared to bare as-deposited Ti64, where the α and columnar prior β grain sizes decreased with increasing YSZ content. The YSZ nanoparticles decomposed during the deposition process and led to the formation of yttrium oxide and some excess oxygen in the Ti64 matrix. The decrease in the sizes of the prior β grains could be attributed to the increasing amount of dissolved oxygen and yttrium, which promoted constitutional supercooling. Furthermore, the reduction in the size of the α grains could be ascribed to a shift of the onset of the β → α+β transformation to a higher temperature and shorter time with increasing concentration of dissolved oxygen. Finally, the contributions of the underlying strengthening mechanisms for the as-deposited specimens were quantitatively determined.
Publisher
JOURNAL MATER SCI TECHNOL
Issue Date
2022-06
Language
English
Article Type
Article
Citation

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, v.112, no.10, pp.138 - 150

ISSN
1005-0302
DOI
10.1016/j.jmst.2021.09.052
URI
http://hdl.handle.net/10203/291332
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0