Paper Title:
Effect of Heat Treatment on Al-40Si Alloy Modified by Sr Addition
  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 microstructures were analyzed using optical microscope. After heat treatment, the hardness decreases about one times. The eutectic matrix and primary Si phase are both refined. The primary Si phase is refined and homogeneously distributes in the matrix with the solution temperature and time increasing. The optimal heat treatment condition is that the solution temperature, solution time, aging temperature, and aging time are 550 °C, 18 hours, 200 °C, and 5 hours, respectively. In addition, the theoretical optimal value for the hardness is 20.6 HRC, which is coherent with the practical optimal value.

  Info
Periodical
Advanced Materials Research (Volumes 378-379)
Chapter
Chapter 1: Applied Mechanics and Materials
Edited by
Brendan Gan, Yu Gan and Y. Yu
Pages
108-111
DOI
10.4028/www.scientific.net/AMR.378-379.108
Citation
W. K. An, A. H. Cai, X. F. Tan, X. S. Li, Y. Luo, "Effect of Heat Treatment on Al-40Si Alloy Modified by Sr Addition", Advanced Materials Research, Vols. 378-379, pp. 108-111, 2012
Online since
October 2011
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Price
$32.00
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