Inter-granular liquid phase aiding grain boundary sliding in superplastic deformation of fine-grained ZK60 Mg alloy

Shyong Lee, Chih Te Chiang, Chun Lin Chu, Chang Chuan Hsu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

For 7475 Al alloy, there were micrographs showing filaments or whiskers formation during the separation stage of superplastic elongation. This indicates the presence of liquid phase which accommodates grain boundary sliding to reach superplasticity. On the other hand, there is no such phenomenon reported regarding Mg alloy in literatures. Scanning electron microscopic (SEM) fractography exceptionally exhibits a mark of grain boundary sliding and its accommodating mechanism of inter-granular liquid phase. Under the testing conditions of 350 °C and 1×10-4 s-1, the initially fine-grained structure (3.7 μm) yields 642% superplastic elongation and exhibits fluffy appearance on the fractured surface. For other specimens showing less superplasticity, their fractured surfaces exhibit partial fluffy appearance.

Original languageEnglish
Pages (from-to)s576-s579
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Volume20
Issue numberSUPPL. 2
DOIs
StatePublished - Jul 2010

Keywords

  • grain boundary sliding
  • inter-granular phase
  • Mg alloy
  • superplastic deformation

Fingerprint

Dive into the research topics of 'Inter-granular liquid phase aiding grain boundary sliding in superplastic deformation of fine-grained ZK60 Mg alloy'. Together they form a unique fingerprint.

Cite this