Paper Title:
Microstructural Evolution of Eutectic Al-Si Alloys Produced by Semi-Continuously DC Casting during Heating and Hot-Rolling
  Abstract

Semi-continuously direct chill (DC in short) casting was carried out to modify the size and morphology of eutectic Si particles in eutectic Al-Si alloy. Successively, the size, morphology, distribution characters of eutectic Si particles and the hot plasticity ability of the alloy during heating and hot-rolling were investigated by the observation of optical microstructure characterization and the rolling of wedge bar. The results show that the eutectics in the eutectic Al-Si alloy can be remarkably fined by semi-continuously DC cast. The eutectic Si phase particles will coarsen and spheroidize after holding at 480°C for 2h, which enables eutectic Al-Si alloy to possess excellent hot plasticity free of cracked edge with compression ratio of rolling up to 85% by single pass. Though little difference on the size of spheroidized Si particles during hot rolling can be observed, uniform distribution of the Si particles can be obtained by hot rolling with compression ratio of 85%.

  Info
Periodical
Advanced Materials Research (Volumes 146-147)
Edited by
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
Pages
1289-1292
DOI
10.4028/www.scientific.net/AMR.146-147.1289
Citation
T. Hong, G. Zhao, N. Tian, F. X. Yu, L. Zuo, "Microstructural Evolution of Eutectic Al-Si Alloys Produced by Semi-Continuously DC Casting during Heating and Hot-Rolling", Advanced Materials Research, Vols. 146-147, pp. 1289-1292, 2011
Online since
October 2010
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