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Effect of holding time on the microstructure of Mg-3Si-1.70Sn alloy during semisolid isothermal heat treatment

  • College of Materials Science and Chemical Engineering, Harbin Engineering University
  • Hebei University of Science and Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The microstructural evolution behavior of Mg-3Si-1.70Sn alloys during semisolid isothermal heat treatment was investigated by optical microscopy observations in the present study. With the holding time increasing, the grains evolve to be more spheroidal and 15min is adequate for the alloy to be spheroidized, after this coarsening begins to happen. The amount of the "liquid islands" inside α-Mg grains decreases and that of the liquid phase at the grain boundaries increases with the prolonged holding time. Moreover, the morphology of eutectic Mg2Si phases changes from the "Chinese script" and/or long-fiber shape to short fiber or spherical shapes during semisolid isothermal heat treatment, which can be attributed to the "Rayleigh shape instability".

Original languageEnglish
Title of host publicationAdvanced Materials Researches, Engineering and Manufacturing Technologies in Industry
Pages231-235
Number of pages5
DOIs
StatePublished - 2013
Externally publishedYes
Event2013 2nd International Symposium on Materials Science and Engineering Technology, ISMSET 2013 - Guangzhou, China
Duration: 27 Jun 201328 Jun 2013

Publication series

NameAdvanced Materials Research
Volume787
ISSN (Print)1022-6680

Conference

Conference2013 2nd International Symposium on Materials Science and Engineering Technology, ISMSET 2013
Country/TerritoryChina
CityGuangzhou
Period27/06/1328/06/13

Keywords

  • Mg-3Si-1.70sn alloy
  • MgSi
  • Microstructural evolution
  • Semisolid isothermal heat treatment

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