Paper Title:
Effect of Compound Modification on Structure of Hypereutectic Al-Si Alloy
  Abstract

Double compound modification was carried out for hypereutectic Al-24Si alloy. The experiment showed that double modification with phosphorus and rare earth can fine the structure of alloy. The complex modifications of phosphorus and rare earth make the coarse block primary silicon obviously refined and the large needle eutectic silicon modified to the fine fibrous or lamella ones. Phosphorus mainly refines the primary silicon. Rare earth can well refine the primary and eutectic silicon, but its modification effect on the eutectic silicon is more obvious. The alloys with the additions of 0.10% phosphorus and 0.9% rare earth have the optimal microstructure. Compared with the unmodified alloy, the primary silicon of alloys can be refined from 93.5 μm to 24.1 μm and the eutectic silicon can be refined from 8.5 μm to 5.3 μm. Mechanism of double compound modification with phosphorus and rare earth is discussed as well.

  Info
Periodical
Advanced Materials Research (Volumes 160-162)
Edited by
Guojun Zhang and Jessica Xu
Pages
189-193
DOI
10.4028/www.scientific.net/AMR.160-162.189
Citation
N. C. Liu, J. Q. Li, Z. X. Liu, "Effect of Compound Modification on Structure of Hypereutectic Al-Si Alloy", Advanced Materials Research, Vols. 160-162, pp. 189-193, 2011
Online since
November 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Arne K. Dahle
Abstract:The nucleation dynamics and grain refinement during solidification are reviewed. Control of the nucleation of phases is an essential step in...
287
Authors: De Hong Lu, Ming Zhou, Shao Sheng Wei, Ye Hua Jiang, Rong Zhou
Abstract:The effect of the temperature at the friction surface on spheroidization and refinement of Si particles in hypereutectic Al-30Si alloys was...
102
Authors: Wei Ke An, An Hui Cai, Xiang Fu Tan, Xiao Song Li, Yun Luo
Chapter 1: Applied Mechanics and Materials
Abstract:The Al-40Si alloy modified by 1.0 wt% Sr addition was heat-treated using L9(34) orthogonal test. The mechanical properties were measured. The...
108
Authors: Ai Qin Wang, Jing Pei Xie, Wen Yan Wang, Luo Li Li
Chapter 1: Material Science
Abstract:In the present work, the Al-21Si-0.8Mg-1.5Cu-0.5Mn alloys composite modified by P+RE was prepared by metal mold casting. The tribological...
28
Authors: Bo Gao, Fei Jiang, Yi Hao, Gan Feng Tu, Lei Chen, Weixi Shi
Chapter 1: Non-Ferrous Metal Material
Abstract:The influence of Nd on structure and properties of hypereutectic Al-Si alloys (Al-17.5%Si, Al-25%Si) was investigated in this paper. For...
105