In-situ characterization of dendrite tip radius in Sn-base alloys

R. Yoshimura, K. Morishita, H. Yasuda, H. Esaka, K. Shinozuka

Research output: Contribution to journalArticle

Abstract

The solidification processes for Sn2Ag alloy and Sn2Ag0.6Zn alloy have been directly observed insitu using timeresolved Xray imaging at SPring8. In case of low cooling rate, the solidification condition is in coupled zone, the primary(βSn)has been overgrown by the eutectic structure. In case of other cooling conditions, the solidification of primary(βSn)dendrites and inter-dendritic eutectic structure have been observed. The dendrite tip radii have been characterized. It was found that the dendrite tip radius decreased as the growth velocity increased. The tip radius in Sn2Ag0.6Zn alloy is found to be smaller than that in Sn2Ag alloy, when the growth velocity is the same. The values of tip radius agreed well with the previous results which were obtained using the unidirectional solidification and quenching technique.

Original languageEnglish
Pages (from-to)78-83
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume82
Issue number3
DOIs
Publication statusPublished - 2018

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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