Effect of Calcium on Structure, Phase Composition and Hardening of Al-Zn-Mg Alloys Containing up to 12wt.%Zn

AUTOR(ES)

Belov, Nikolay Aleksandrovich, Naumova, Evgenia Alexandrovna, Akopyan, Torgom Karoevich

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

03/11/2015

RESUMO

The influence of calcium on structure and phase composition of the aluminum alloys, containing additions of zinc up to 12 wt.% and magnesium (3.5 wt.%) was studied. The increase of Zn content leads to formation of Al4Ca primary crystals at lower concentrations of calcium. Zinc is distributed between aluminum solid solution and intermetalic phases (Ca-containing and T- Al2Mg2Zn3) in the alloys of the Al-Zn-Mg-Ca system. The eutectic (Al)+Al4Ca has fine structure and particles of Al4Ca are capable to spheroidization during heat treatment at 500 °С. The maximal level of hardness observed on calcium containing alloys was higher than 200 HB, what gives a reason to expect good strength properties. Due to summarized results it is seen that the Al-Zn-Mg-Ca system is promising for development of new eutectic type high-strength aluminum alloys.

Documentos Relacionados

• Avaliação do comportamento mecânico de ligas Al-Xwt%Si-5wt%Zn tixoconformadas
• Avaliação da tixoconformabilidade de ligas AI-Xwt%Si-5wt%Zn
• Effect of phase transformations on hardness in Zn-Al-Cu Alloys
• Effect of Growth Velocity and Zn Content on Microhardness in Directionally Solidified Al-Zn Alloys
• Correlations of microstructure and mechanical properties of the ternary Sn-9wt%Zn-2wt%Cu solder alloy