Paper Title:
The Effect of Initial Microstructure of A356 Alloys on the Mechanical Behavior in the Semisolid State
  Abstract

The quality of semisolid casting largely depends on the formability of the semisolid feedstock. Despite of the semisolid casting process conditions, the initial microstructure of the feedstock plays a significant role in determining the metal formability under the semisolid state. In this study, the effect of initial microstructure of A356 alloy on the mechanical forming response in its semisolid state was investigated. A wide range of the initial microstructures varied from a very coarse dendritic structure to a fine globular structure were produced in A356 alloy using the Controlled Nucleation Method, particularly by controlling pouring temperature during solidification. Cylindrical specimens with 12 mm in diameter and 10 mm in height were compressed to a height reduction of 8 mm at constant strain rates from 1.3910-1 /s to 1.3910-3 /s. Strain rate jump tests were also carried out in order to evaluate the strain rate sensitivity at high fraction solid of 0.9. The materials produced with a low superheat exhibit a fine globular structure. They showed a very low compression stress in the semisolid state compared with the materials poured at high temperatures, which have coarse and dendritic structure.

  Info
Periodical
Solid State Phenomena (Volumes 116-117)
Edited by
C.G. Kang, S.K. Kim and S.Y. Lee
Pages
449-452
DOI
10.4028/www.scientific.net/SSP.116-117.449
Citation
Z. L. Ning, H. Wang, J. F. Sun, "The Effect of Initial Microstructure of A356 Alloys on the Mechanical Behavior in the Semisolid State", Solid State Phenomena, Vols. 116-117, pp. 449-452, 2006
Online since
October 2006
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: Suk Won Kang, Dock Young Lee, Ki Bae Kim
Abstract:Semi-solid slurry for a rheocasting process requires a fine and globular structure of primary solid phase. In the present study, in order to...
332
Authors: Ju Fu Jiang, Shou Jing Luo
Abstract:Mechanical behavior of processed AZ91D magnesium alloy by equal channel angular extrusion during semi-solid isothermal compression was...
530
Authors: Hong Yan, Fa Yun Zhang, Wei Pan
Abstract:The microstructural evolution of SiCp/AZ61 composites during partial remelting was investigated. The results indicated that the suitable...
545
Authors: Fa Yun Zhang, Jian Xiong Ye, Hong Yan
Abstract:Effects of SiC particle and holding time on microstructure evolution of SiCP/AZ61 composites during semi-solid isothermal heat treatment...
628
Authors: M. Karshenas, M. Emamy, E. Fadaei
Abstract:The effects of isothermal temperature on the microstructure evolution of semisolid A6070 alloy produced by strain-induced melt activation...
415