Effects of Minor Zirconium on Microstructure and Mechanical Properties of Al-Mg-Mn-Sc Alloys

Xianming Chen, Yingying Fan, Qinglin Pan

2018

Abstract

Al-5.8Mg-0.4Mn-0.25Sc and Al−5.8Mg−0.4Mn−0.25Sc−0.1Zr (mass fraction, %) alloys were prepared by water chilling copper mould ingot metallurgy processing which was protected by active flux. The effects of Zr on microstructure and mechanical properties were studied by means of observations of optical microscopy and transmission electron microscopy. The results show that after adding Zr into Al-5.8Mg-0.4Mn-0.25Sc alloy the grains are obviously refined. Tensile properties increase significantly; under the condition that ductility(δ) is similar, tensile strength(σb) increases by nearly 20%, and the yield strength(σ0.2) increases by more than 30%. Zirconium in the alloy leads to the formation of more heterogeneous nucleation core during casting process, and more primary Al3(Sc,Zr) particles precipitate, thus refining the grain. In the same time the supersaturated solid solubility in the alloy can be improved. After stabilizing annealing，there is a higher degree of dispersion, and smaller and more secondary Al3(Sc,Zr) particles come to distribute in the matrix, improving the comprehensive mechanical properties of alloy with functions of strong pinning dislocations and sub-grain boundaries, and stabilizing sub-structures.

Paper Citation

in Harvard Style

Chen X., Fan Y. and Pan Q. (2018). Effects of Minor Zirconium on Microstructure and Mechanical Properties of Al-Mg-Mn-Sc Alloys.In Proceedings of the 2nd International Conference on Intelligent Manufacturing and Materials - Volume 1: ICIMM, ISBN 978-989-758-345-2, pages 390-395. DOI: 10.5220/0007532403900395

in Bibtex Style

@conference{icimm18,
author={Xianming Chen and Yingying Fan and Qinglin Pan},
title={Effects of Minor Zirconium on Microstructure and Mechanical Properties of Al-Mg-Mn-Sc Alloys},
booktitle={Proceedings of the 2nd International Conference on Intelligent Manufacturing and Materials - Volume 1: ICIMM,},
year={2018},
pages={390-395},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007532403900395},
isbn={978-989-758-345-2},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 2nd International Conference on Intelligent Manufacturing and Materials - Volume 1: ICIMM,
TI - Effects of Minor Zirconium on Microstructure and Mechanical Properties of Al-Mg-Mn-Sc Alloys
SN - 978-989-758-345-2
AU - Chen X.
AU - Fan Y.
AU - Pan Q.
PY - 2018
SP - 390
EP - 395
DO - 10.5220/0007532403900395