Paper Title:
Improving the Microstructures and Mechanical Properties of Hypereutectic Al-Si Alloys by Spray Forming Technique
  Abstract

The hypereutectic Al-Si alloys with different Cr additions have been prepared by spray forming and cast processes. With adding Cr into Al-25Si-5Fe-3Cu (wt.%, denoted as 3C) alloy, the long needle-like δ-Al4FeSi2 phases in the cast 3C alloy were almost substituted by skeletal α-Al(Fe,Cr)Si phase, which was refined into granular α-Al(Fe,Cr)Si phase (≤ 3-5 μm) in Cr-added deposits. By using hot extrusion almost full densification of the deposits can be made, but induces coarsening of Fe-bearing phases in as-deposited 3C and C10 (adding 1.0 wt.% Cr into 3C alloy) alloys. The size of the granular α-Al(Fe,Cr)Si phase is still less than 5 μm after hot extrusion of the as-deposited C20 alloy, while some plate-like β-Al5(Fe,Cr)Si phases (~20 μm) disappeared. The thermal stability, mechanical properties were also evaluated.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1416-1419
DOI
10.4028/www.scientific.net/MSF.654-656.1416
Citation
H. Cui, L.G. Hou, Y. H. Cai, J. S. Zhang, "Improving the Microstructures and Mechanical Properties of Hypereutectic Al-Si Alloys by Spray Forming Technique", Materials Science Forum, Vols. 654-656, pp. 1416-1419, 2010
Online since
June 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: Young Hee Cho, Dae Heon Joo, Chul Hyun Kim, Hu Chul Lee
Abstract:The role of alloying elements in the improvement of the high temperature strength of Al-12Si(CuNiMg) cast alloys used for automotive piston...
461
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: Bong Hwan Kim, Sang Mok Lee
Chapter 1: Advanced Processing Technology
Abstract:This study aims to investigate the effects of mechanical melt-shearing treatment during casting process on the morphological change of...
160
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