Paper Title:
Effect of T6 Heat Treatment on the Microstructures and the Aging Behavior of the Grain-Refined A356 Alloys
  Abstract

The influence of T6 heat treatment on the microstructures and aging precipitation in the grain-refined A356 alloys were investigated. Experimental results showed that, when T6 heat treatment was performed, the average values of mean diameter, aspect ratio, and roundness of silicon particles in the grain-refined specimens were decreased to 2.26~3.14 μm, 2.06~2.2, and 3.1~4.2, respectively. DSC curves revealed that three kinds of precipitates, i.e., β″, β′, and β, were observed in both unrefined and grain-refined A356 alloys. The exothermic peaks in the grain-refined A356 alloy shifted to high temperatures, suggesting the nucleation of β″ precipitates was decelerated. This could be ascribed to the minor solution of Ti or B elements during solid solution treatment.

  Info
Periodical
Advanced Materials Research (Volumes 143-144)
Edited by
H. Wang, B.J. Zhang, X.Z. Liu, D.Z. Luo, S.B. Zhong
Pages
1410-1414
DOI
10.4028/www.scientific.net/AMR.143-144.1410
Citation
M. Zhu, G. C. Yang, L. J. Yao, Y. H. Zhou, "Effect of T6 Heat Treatment on the Microstructures and the Aging Behavior of the Grain-Refined A356 Alloys", Advanced Materials Research, Vols. 143-144, pp. 1410-1414, 2011
Online since
October 2010
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