Effect of the al addition on the structure of directionally solidified Ni-W eutectic composites

M. Yoshida, T. Tujimura, H. Nakae

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effect of al addition on the growth morphology of α-W phase in Ni-W eutectic alloy was investigated. The trajectory of the eutectic liquids trough was also estimated by thermal analysis and microstructure observation to determine the optimal quantity of al for directional solidification. The trajectory is expressed as follows: Ni-(21-X)at%W-Xat%Al, X≤5. Based upon these results, the directional solidification was carried out at the composition of Ni-16at%W-5at%Al. The composite structure was obtained under the condition of G/R/>40 (K*hr/cm2). The rods to lamellae transition shifted at a lower rate than that of the binary Ni-W eutectic. Also many growth defects were observed in the α phase. These defects may be caused by the existence of a freezing range, since the α primaries grow non-faceted, though the eutectic α phases grow faceted.

Original languageEnglish
Title of host publicationFirst International Conference on Processing Materials for Properties
PublisherPubl by Minerals, Metals & Materials Soc (TMS)
Pages67-70
Number of pages4
ISBN (Print)0873392566
Publication statusPublished - 1993 Dec 1
EventProceedings of the 1st International Conference on Processing Materials for Properties - Honolulu, HI, USA
Duration: 1993 Nov 71993 Nov 10

Publication series

NameFirst International Conference on Processing Materials for Properties

Other

OtherProceedings of the 1st International Conference on Processing Materials for Properties
CityHonolulu, HI, USA
Period93/11/793/11/10

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Yoshida, M., Tujimura, T., & Nakae, H. (1993). Effect of the al addition on the structure of directionally solidified Ni-W eutectic composites. In First International Conference on Processing Materials for Properties (pp. 67-70). (First International Conference on Processing Materials for Properties). Publ by Minerals, Metals & Materials Soc (TMS).