Paper Title:
Correlation between Thermal Parameters, Primary Dendrite Arm Spacing and Microhardness on a Directionally Solidified Ternary Al-6wt%Cu-8wt%Si Alloy
  Abstract

The objective of this paper is to present an experimental study that aimed to establish correlations between primary dendrite spacing (λ1) and microhardness of a ternary Al-6wt%Cu-8wt%Si alloy solidified under transient heat extraction, using a horizontal unidirectional water-cooled solidification device. To examine the microstructural evolution, solidification thermal parameters (growth rate and cooling rate - VL and TR, respectively) were calculated through the application of an experimental method and were then correlated with λ1 using analytical power functions laws. The correlation between microstructural parameters and the measured microhardness values are presented in the forms of power and Hall-Petch types of equations. The analysis of the microstructure of the investigated alloy indicated that the increasing of TR and VL reduced the primary dendrite arm spacing, increasing the microhardness.

  Info
Periodical
Edited by
Andreas Öchsner, Graeme E. Murch, Ali Shokuhfar and João M.P.Q. Delgado
Pages
136-141
DOI
10.4028/www.scientific.net/DDF.365.136
Citation
O.L. Rocha, A.L. Moreira, T.A. Costa, J.M.D. Filho, S.L. Paula, A. P. Silva, "Correlation between Thermal Parameters, Primary Dendrite Arm Spacing and Microhardness on a Directionally Solidified Ternary Al-6wt%Cu-8wt%Si Alloy", Defect and Diffusion Forum, Vol. 365, pp. 136-141, 2015
Online since
July 2015
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: M.L.N.M. Melo, R.G. Santos
Abstract:A particularly important defect related with solute segregation during solidification is the microporosity, which influences mechanical...
251
Authors: Lin Liu, Fa Qin Xie, Jun Zhang, Heng Zhi Fu
Abstract:Directional solidification technique permits materials to grow along specific orientation, in order to obtain mechanical and/or physical...
3106
Authors: Pei Zhang, Feng Shan Du, Zhi Qiang Xu, Ling Ling Zhao
Abstract:A stochastic mathematic model contained the effects of dendrite morphology, solidification shrinkage and dissolved gases was formed to...
115
Authors: Bok Hyun Kang, Woo Hyun Lee, Ki Young Kim, Hoon Cho, Jae Soo Noh
Abstract:Cu-2wt.Ag-2wt.%Zr alloy was directionally solidified with different growth rates(V=10-200 um/s) at a constant temperature gradient(G=3.1...
192
Authors: I. Basu, J.T. Wood, Jonathan P. Weiler
Chapter 11: Magnesium Alloys
Abstract:In this study, commercial AM60B magnesium alloy was studied under different solidification conditions to understand the influence of cooling...
1279