The first refined granular microstructure solidified from undercooled Cu70Ni30 melts

Xuefeng Guo, Feng Liu, Gencang Yang, Jiandong Xing

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The microstructure evolution of Cu70Ni30 alloy melts was systematically investigated in the undercooling range of 21 K to 270 K by using glass fluxing technique combined with cycle superheating and cooling processing in high vacuum. When ΔT < ΔT*2(120 K), the first granular crystalline formed gradually from dendrite with increasing undercooling. The analysis of microstructure and composition shows that high-angle boundaries do not coincide with the segregation zone between remelted fragments. It is shown that the grain refinement process consists of the disintegration of dendrite formed in rapid solidification and recrystallization of dendritic fragments.

Original languageEnglish
Pages (from-to)351-355
Number of pages5
JournalJinshu Xuebao/Acta Metallurgica Sinica
Volume36
Issue number4
StatePublished - Apr 2000

Keywords

  • CuNi alloy
  • Dendrite remelting
  • Recrystallization
  • Undercooling

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