Paper Title:
Macrosegregation and Porosity during Directional Solidification of a Ternary Al-9wt%Si-3wt%Cu Alloy
  Abstract

Macrosegregation and porosity formation have been investigated by both a numerical model and by transient directional solidification experiments. The macrosegregation pattern, the theoretical and apparent densities are presented as a function of the casting length. X-ray fluorescence spectrometry was used to determine the macrosegregation profiles. The measurement of microporosity was performed using pyknometry analysis. The local composition along an Al-9wt%Si-3wt%Cu casting length was used as an input parameter for simulations of microporosity evolution. The results have demonstrated that the presence of Si in the alloy composition has inhibited the inverse copper segregation, which is a typical result of directionally solidified Al-Cu castings. The numerically simulated trend is in good conformity with the experimental scatter.

  Info
Periodical
Defect and Diffusion Forum (Volumes 312-315)
Edited by
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
Pages
405-410
DOI
10.4028/www.scientific.net/DDF.312-315.405
Citation
L.G. Gomes, P. D. Jácome, I. L. Ferreira, D.J. Moutinho, O.L. Rocha, A. Garcia, "Macrosegregation and Porosity during Directional Solidification of a Ternary Al-9wt%Si-3wt%Cu Alloy", Defect and Diffusion Forum, Vols. 312-315, pp. 405-410, 2011
Online since
April 2011
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: Hideo Nakajima, Soong Keun Hyun, Masakazu Tane, T. Nakahata
Abstract:Lotus-type porous materials whose long cylindrical pores are aligned in one direction were fabricated by unidirectional solidification from...
295
Authors: Shunkichi Ueno, Li Ming Lin, Hideo Nakajima
Abstract:A porous alumina with cylindrical pores was fabricated by unidirectional solidification under hydrogen gas flow (0.1 MPa) using alumina feed...
313
Authors: Ying Zhang, Guo Rui Jia, Xian Jiao Xie, Shui Sheng Xie, Jin Yu He, De Fu Li, Wen Sheng Sun, Mao Peng Geng
Smart/Intelligent Materials/Intelligent Systems
Abstract:Numerical method was used to simulate the solidification process of zinc-aluminum alloy Zamak 5, shrinkage porosity of the zinc-aluminum...
2902
Authors: Derya Dispinar, S. Akhtar, A. Nordmark, F. Syvertsen, M. Di Sabatino, L. Arnberg
Chapter 2: Forming in Melt or Near Melt Condition
Abstract:Gravity die casting (GDC) and low pressure die casting (LPDC) methods were used to compare the mechanical properties and porosity...
283
Authors: Yong Huang, Yue Dong, Xiao Ming Du
Chapter 2: Manufacturing and Design Science
Abstract:Filling and solidification for aluminum alloy packing block in die casting were simulated by numerical simulation. Distribution and change of...
2362