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

M. Yoshida, T. Tujimura, H. Nakae

研究成果: Conference contribution

抄録

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.

本文言語English
ホスト出版物のタイトルFirst International Conference on Processing Materials for Properties
出版社Publ by Minerals, Metals & Materials Soc (TMS)
ページ67-70
ページ数4
ISBN(印刷版)0873392566
出版ステータスPublished - 1993 12 1
イベントProceedings of the 1st International Conference on Processing Materials for Properties - Honolulu, HI, USA
継続期間: 1993 11 71993 11 10

出版物シリーズ

名前First 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

ASJC Scopus subject areas

  • 工学(全般)

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