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Influence of solution heat treatment on structure and mechanical properties of ZNAL22CU3 alloy

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Abstract

The influence of solution heat treatment at 385°C over 10 h with cooling in water on the structure, hardness and strength of the ZnAl22Cu3 eutectoid alloy is presented in the paper. The eutectoid ZnAl22Cu3 alloy is characterized by a dendritic structure. Dendrites are composed of a supersaturated solid solution of Al in Zn. In the interdendritic spaces a eutectoid mixture is present, with an absence of the (CuZn4) phase. Solution heat treatment of the ZnAl22Cu3 alloy causes the occurrence of precipitates rich in Zn and Cu, possibly phase. Solution heat treatment at 385°C initially causes a significant decrease of the alloy hardness, although longer solution heat treatment causes a significant increase of the hardness as compared to the as-cast alloy.

Original languageEnglish
Pages (from-to)1235-1240
Number of pages6
JournalArchives of Metallurgy and Materials
Volume61
Issue number3
DOIs
Publication statusPublished - 2016

Keywords

  • Heat treatment
  • Mechanical properties
  • Structure
  • ZnAl22Cu3 alloy

ASJC Scopus subject areas

  • Metals and Alloys

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