Effect of Mg-30%La Modification on the Microstructure of Al-7Si Alloy

Abstract:

Thepresent work investigated the effects of grain refiners Mg-30%La alloy on theimpact properties of Al-7Si Alloy. Theresults showed that the addition of Mg-30%La greatly fined the crystal grain. As La content increased in Al-7Si alloy,the alpha-Al with dendritic crystal were refined and the trend of the equiaxedcrystal had obvious enhancement. The introduce of the Mg-30%La cangovern the morphology of the Si phase. With increase of Mg-30%La content,refining effect was better.

• Periodical: Applied Mechanics and Materials (Volumes 727-728)
• Pages: 126-129
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.727-728.126
• Online since: January 2015
• Authors: Dong Song Yin*, Zhong Kai Zhang, Yu Chen, Zheng Ling Wang, Chun Yu Zhang, Chun Yang Wang, Yu Cheng Yu, Yong Liang An, Zhou Li, Qian Tao Pang, Qing Shan Li, Rui Chen
• Keywords: Aluminium Alloy, Grain Refine, Mg-30%La Alloy

References

[1] Shabestari S G, Gruzleski J E. Modification of ironintermetallics by strontium in aluminum alloys[J]. AFS Transactions, 1995. 285-293.

[2] Heiberg G, Nogita K, Dahle A K. Columnar to equiaxed transition of eutectic in hypoeutectic aluminium-silicon alloys[J]. Acta Materialia, 2002, (10): 2537-2546.

DOI: 10.1016/s1359-6454(02)00081-2

[3] Shahrooz Nafisi, Reza Ghomashchi. Combined grain refining and modification of conventional and rheocast A356 Al-Si alloy[J]. Materials Characterization, 2006: 371-385.

DOI: 10.1016/j.matchar.2006.03.016

[4] Mcdonald D Stuart, Nogita Kazuhiro, Dahle K Arne. Eutectic grain size and strontium concentration in hypoeutectic aluminium-silicon alloys[J]. Journal of Alloys and Compounds, 2006, (1): 184-191.

DOI: 10.1016/j.jallcom.2005.11.070

[5] Yun Dong, Runguo Zheng, Xiaoping Lin, et al. Investigation on the modification behavior of A356alloyinoculated with a Sr-Y compositemodifier[J]. Journal of Rare Earths, 2013, Vol. 31, (2): 204-208.

[6] A.K. Prasada Rao, K. Das, B.S. Murty, M. Chakraborty. Microstructural features of as-cast A356alloyinoculated with Sr, Sbmodifiersand Al–Ti–C grain refiner simultaneously[J]. Materials Letters, 2008, Vol. 62: 273-275.

DOI: 10.1016/j.matlet.2007.05.020

[7] Parvinder Kaur, Gurinder Pal Singh, et al. Modifierrole of cerium in lithiumaluminiumborate glasses[J]. Journal of Molecular Structure, 2012, Vol. 1020: 83-87.

[8] YIN Fei , YANG Jiang -bo, WANG Yi –xin. Analys is of the Method Eliminating the Detrimental Ef fects of Iron Phase on Al-Si Alloys[J]. Working Technology.

[9] MA Yong-Qing, GUAN De-lin. MultiPleM do if ieation for Rare Earth -A I A l l o y. Special Casting & Nonferrous Alloys. 1993, 1: 22-24.

[10] TANG Duo-guang. An Excel lent Material for Casting Al Alloy Ref inement and Modif ication— Rare-Earth Alloy. Special Casting & Nonferrous Alloys. 1999, 5: 42-44.