Premium
Effects of Zirconium Additions on the Microstructure of As‐Cast and Aged AZ91 Magnesium Alloy
Author(s) -
Kabirian Farhoud,
Mahmudi Reza
Publication year - 2009
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200800223
Subject(s) - materials science , intermetallic , microstructure , metallurgy , zirconium , alloy , eutectic system , isothermal process , magnesium , magnesium alloy , redistribution (election) , thermodynamics , physics , politics , political science , law
The effects of Zr addition on the microstructure of AZ91 alloy were investigated under as‐cast and isothermally aged conditions. The microstructures contained a eutectic β ‐Mg 17 Al 12 phase together with fine Al–Zr intermetallic compounds. These intermetallic compounds inhibited grain growth during the 420 °C isothermal aging of Zr‐containing alloys. Microstructural changes caused by Zr additions were most probably due to the consumption of Al by Zr, and redistribution of Al during solidification of dendrites.