Effects of treating processes on microstructure of commercial Al–10Sr master alloy and its refinement efficiency to AZ31 magnesium alloy

Abstract

In the present paper, the effects of treating processes on the microstructure of commercial Al-10Sr master alloy and its refinement efficiency to AZ31 magnesium alloy are investigated. The results indicate that the solution heat treatment, rolling and remelting have significant effects on the morphology and/or size of Al 4 Sr phase in the commercial Al-10Sr master alloy. After being solutionised at 773 K for 4 h and followed by water quenching, the Al 4 Sr phases evolve from coarse blocks to relatively fine blocks. However, after being rolled at 573 K for a total reduction level of 50% or remelted and followed by rapid cooling, the Al 4 Sr phases respectively exhibit fine particles or fibre shapes. In addition, after the commercial Al-10Sr master alloy is solutionised, rolled or remelted, its refinement efficiency to AZ31 alloy is improved, and the improvement resulting from the remelting is the most significant, the next is rolling and solutionisation respectively.

Influence of modifying methods on quality of eutectic and hypereutectic silumine for diesel engine pistons

“…There are a number of parameters that might affect the formation of the alloy structure during the melting and/or casting phase. [14][15][16][17][18][19] Modification process, as one of the most important parameters that influence the properties of alloy, is investigated in this study.…”