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

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المؤلفون: Yang, M. B.^1,2 ; Pan, F. S.²; Cheng, R. J.²; Tang, A. T.²; Shen, J.¹
المصدر:
International Journal of Cast Metals Research. 2007, Vol. 20 Issue 6, p297-303. 7p. 6 Black and White Photographs, 2 Charts, 3 Graphs.
الموضوع:
*ALLOYS; *MAGNESIUM alloys; *HEAT treatment of aluminum alloys; *MECHANICAL behavior of materials; *MICROSTRUCTURE

معلومة اضافية
- نبذة مختصرة :
  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 Al4Sr phase in the commercial Al–10Sr master alloy. After being solutionised at 773 K for 4 h and followed by water quenching, the Al4Sr 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 Al4Sr 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. [ABSTRACT FROM AUTHOR]