Influence of gravity on monotectic and eutectic growth

Ichiro Aoi, Makoto Yoshida, Makoto Ishino, Hideo Nakae

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

1 Citation (Scopus)

Abstract

The influence of gravity on the microstructure of unidirectionally solidified Cu-Pb monotectic, Ag-Si and Fe-C eutectic alloys is studied. In order to examine the influence of gravity in a 1 g environment, both the upward (opposite to direction of gravity) and downward (direction of gravity) unidirectional solidifications are carried out. The results are as follows: (1) For the upward solidified Ag-Si eutectic alloy, the eutectic Si continuously grows. On the other hand, in the downward solidified Ag-Si alloy, the Si grows discontinuously and disperses into the α-Ag matrix. (2) No morphological difference in the eutectic growth is observed between the upward and downward solidified Fe-C eutectic alloys. (3) In the case of the upward solidified Cu-Pb monotectic alloy, a banded structure, which consists of Pb-rich layers and Cu-rich layers, is observed. However, such a banded structure is not observed in the downward specimen. (4) The banded structure is not found in the upward solidified Cu-Pb-0.05 mass%Al and Cu-Pb-0.1 mass%al alloys. In the Cu-Pb-0.05 mass%Al alloy, a fibrous L2 phase grows continuously parallel to the growth direction at low growth rate. Only 500 mass ppm addition of aluminum induces the morphological change of the monotectic L2 phase.

Original languageEnglish
Title of host publicationProceedings of the Second International Conference on Processing Materials for Properties
EditorsB. Mishra, C, Yamauchi, B. Mishra, C. Yamauchi
Pages1017-1022
Number of pages6
Publication statusPublished - 2000 Dec 1
Externally publishedYes
EventProceedings of the Second International Conference on Processing Materials for Properties - San Francisco, CA, United States
Duration: 2000 Nov 52000 Nov 8

Publication series

NameProceedings of the Second International Conference on Processing Materials for Properties

Conference

ConferenceProceedings of the Second International Conference on Processing Materials for Properties
CountryUnited States
CitySan Francisco, CA
Period00/11/500/11/8

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Aoi, I., Yoshida, M., Ishino, M., & Nakae, H. (2000). Influence of gravity on monotectic and eutectic growth. In B. Mishra, C. Yamauchi, B. Mishra, & C. Yamauchi (Eds.), Proceedings of the Second International Conference on Processing Materials for Properties (pp. 1017-1022). (Proceedings of the Second International Conference on Processing Materials for Properties).