In situ observation of remelting induced anomalous eutectic structure formation in an undercooled Ni-18.7 at.% Sn eutectic alloy

H. Dong, Y. Z. Chen, K. Wang, G. B. Shan, Z. R. Zhang, K. Huang, F. Liu

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

The forming mechanism of anomalous eutectic structure (AES) in undercooled eutectic alloys has been a controversial issue. In this work, we conducted in situ observation of the AES forming process in an Ni-18.7 at.% Sn eutectic alloy using a high-temperature laser scanning confocal microscope. Our results provide an evidence of the AES formation induced by remelting of primary eutectic lamellae constituted by Ni3Sn and α-Ni lamellae. During recalescence, a pronounced remelting of the Ni3Sn phase into liquid occurs, while the α-Ni lamellae subject to a rapid morphological transition into granules. Eventually, the completion of solidification leads to the AES formation.

Original languageEnglish
Pages (from-to)123-127
Number of pages5
JournalScripta Materialia
Volume177
DOIs
StatePublished - 1 Mar 2020

Keywords

  • Eutectics
  • Ni-Sn alloys
  • Rapid solidification
  • Undercooling

Fingerprint

Dive into the research topics of 'In situ observation of remelting induced anomalous eutectic structure formation in an undercooled Ni-18.7 at.% Sn eutectic alloy'. Together they form a unique fingerprint.

Cite this