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Modification effects of as cast Mg-Al-Si magnesium alloy with strontium

WANG BAOGANG1, WANG XU1,2,* , ZHOU JIXUE2, LIU YUNTENG2, LIANG PING1, WANG YUNLING1, ZHANG GUOFU1

Affiliation

  1. School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, P. R. China
  2. Institute of New Materials, Shandong Academy of Sciences, Jinan 250013, P. R. China

Abstract

This paper reported modification effects of as cast AS31 magnesium alloy with strontium (Sr=0, 0.2, 0.4, 1 wt. Strontium Sr was an effective grain refiner in AS alloys The results indicate d that adding 0.2 wt. %, 0.4 wt. %Sr and 1.0 wt. %Sr to AS31 alloy, the Chinese script Mg2Si phases were modified and refined obviously. The Mg2Si phase changed from coarse Chinese shape to fine granule and irregular poly gonal shapes. Sr could attach to the Mg2Si peripheral, forcing primary Mg2Si balling and suppressing dendritic structure and/ or twice dendrites orientation of dendrite Mg2Si Chinese script phase. Sr was likely to combine with the Si to produce acicular Si2Sr phase..

Keywords

Mg-Al-Si magnesium alloy, Modification, Strontium, Grain refine.

Citation

WANG BAOGANG, WANG XU, ZHOU JIXUE, LIU YUNTENG, LIANG PING, WANG YUNLING, ZHANG GUOFU, Modification effects of as cast Mg-Al-Si magnesium alloy with strontium, Optoelectronics and Advanced Materials - Rapid Communications, 8, 1-2, January-February 2014, pp.63-67 (2014).

Submitted at: Sept. 6, 2013

Accepted at: Jan. 22, 2014