Fabrication of Multiphase Particles and Grain Refinement of Al-Containing Magnesium
Grain refinement is an effective way to improve the mechanical properties of magnesium alloys. However, refining efficiency of grain refiner for Al-containing magnesium alloys is unstable, restricting the further applications in the engineering field. In this paper, a typical Al-containing magnesium alloy (AZ91) was studied. The Al–Ti–C–Y alloy containing multiphase particles (Al4C3, TiC, Al2Y) was prepared by self-propagating high-temperature synthesis (SHS) and melting-casting method. Meanwhile, the size, morphology, and distribution of multiphase particles in the Al–Ti–C–Y alloy and the grain refinement performance of multiphase particles for Al-containing magnesium alloys were investigated. The grain size of the alloys decreases first and then increases with the increasing amount of master alloy added. The highest refining efficiency of Al–Ti–C–Y for AZ91 is 51% with 1.5 wt% master alloy added.
KeywordsMultiphase particles Heterogeneous nucleation Al–Ti–C–Y AZ91
- 2.L.H. Wen, J.I. Ze-Sheng, Research and application of heat-resistant magnesium alloy and its strengthening mechanism. Light Alloy Fabr. Technol. (2014)Google Scholar
- 5.W. Ding, P. Fu, L. Peng et al., Advanced magnesium alloys and their applications in aerospace. Spacecraft Environ. Eng. (2011)Google Scholar
- 6.Y.C. Lee, A.K. Dahle, D.H. Stjohn, Grain Refinement of Magnesium Essential Readings in Magnesium Technology (Springer, 2016), pp. 247–254Google Scholar
- 11.Y.Z. Zhao, X.T. Liu, H. Ha, Effect of Al4C3 particle size distribution in a Al–2.5C master alloy on the refining efficiency of the AZ31 alloy. Acta Metall. Sin. Eng. lett. 30(6), 505–512 (2017)Google Scholar
- 13.X.Y. Liu, H.R. Geng, M. Zuo et al., Influence of MnCO3 addition on the grain refinement of AZ91 magnesium alloy. Appl. Mech. Mater. 703(2), 56–59 (2014)Google Scholar