The Microstructure and Compressive Properties of Aluminum Alloy (A356) Foams with Different Al-Ti-B Additions

  • Zan ZHANG Hebei University of Technology
  • Xing Chuan Xia
  • Jing WANG
  • Weimin ZHAO
  • Bo LIAO
  • Boyoung HUR
Keywords: aluminum foam, melt foaming method, Al-Ti-B, microstructure, compressive property

Abstract

Closed-cell aluminum alloy (A356) foams with different percentages of Al-Ti-B are prepared by melt foaming method, using Ca and TiH2 as thickening agent and foaming agent, respectively. SEM and Quasi-static compression tests are performed to investigate the effect of Al-Ti-B on the microstructure and compressive properties of aluminum alloy (A356) foams. The results show that foams with Al-Ti-B percentage of 0.3 wt.% possess good combinations of micro hardness, yield strength, plateau strength, densification strain and energy absorption capacity under the present conditions. The reasons are mainly due to the foams with Al-Ti-B percentage of 0.3 wt.% possess optimal eutectic Si morphology (with eutectic Si existing in the forms of particles or short fiber).

DOI: http://dx.doi.org/10.5755/j01.ms.22.3.8559

Published
2016-09-01
Section
METALS, ALLOYS, COATINGS