Paper Title:
Modelling the Precipitation of Al3X Dispersoids in Aluminium Alloys and their Effect on Recrystallization
  Abstract

A combined model is presented that predicts the non-uniform distribution of Al3X dispersoid particles in commercial aluminium alloys containing zirconium and scandium and uses these predictions as inputs to a simple recrystallization model. The recrystallization model relies on knowledge of the stored energy in the sub-structure after deformation and this has been measured using electron backscattered diffraction (EBSD) techniques. The recrystallization model is based on the concept that partial recrystallization results from the non-uniform distribution of dispersoid particles due to their precipitation from a segregated cast structure. The model has been used to devise an improved homogenization treatment for AA7050, which uses an isothermal hold during heat up to maximize dispersoid nucleation. It has also been applied to predict the effect of scandium additions on recrystallization, investigate the factors that control the through thickness variation in recrystallized fraction, and interpret the results of experiments where the effect of strain rate have been studied.

  Info
Periodical
Edited by
P. B. Prangnell and P. S. Bate
Pages
45-54
DOI
10.4028/www.scientific.net/MSF.550.45
Citation
J. D. Robson, P. B. Prangnell, B. J. McKay, C. P. Heason, "Modelling the Precipitation of Al3X Dispersoids in Aluminium Alloys and their Effect on Recrystallization", Materials Science Forum, Vol. 550, pp. 45-54, 2007
Online since
July 2007
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: Shi Hoon Choi, B.J. Kim, S.I. Kim, Jin Won Choi, Kwang Geun Chin
Abstract:A modified two dimensional (2-D) Monte Carlo (MC) technique was used to simulate primary recrystallization in automotive steels containing...
171
Authors: Hasso Weiland, Soon Wuk Cheong
Abstract:Control of grain size during recrystallization of aluminum alloys is critical when tailoring material properties for structural...
383
Authors: Xin Yun Wang, Hui E Hu, Ju Chen Xia
Abstract:Compression tests of 7050 aluminum alloy have been conducted at different temperatures (340, 380, 420, and 460 °C) with strain rate of 0.1...
305
Authors: J.M. Rodriguez-Ibabe, P. Uranga, B. López
Keynotes
Abstract:The microstructural heterogeneities in steels may have different origins. The tendency in industry to decrease the total amount of reduction...
157
Authors: Tatsuaki Sakamoto, Shohei Otsuka, Sengo Kobayashi
Chapter 2: Contributed Papers
Abstract:Dynamic recrystallization in Ti-1100 was investigated. Ti-1100 is one of near α titanium alloys and contains Si for improving high...
1634