Paper Title:
Simulation of Copper Precipitation in Fe-Cu Alloys
  Abstract

During ageing of Fe-Cu alloys, for standard ageing conditions, peak hardness and strength is often observed after several hours. The significant strengthening is attributed to a dense distribution of very small bcc-Cu precipitates of 2-3 nm size. Using conventional numerical precipitation kinetics models for diffusion-controlled transformations, the kinetics of strengthening cannot be consistently described. One of the issues in this aspect is the fact that, after reaching peak hardness, a strong decrease in number density is observed experimentally, which cannot be explained by classical Ostwald ripening theory. In the present study, a new methodology for simulation of the copper precipitation kinetics in the early stage is suggested. The basic idea of this approach is to take into account the composition variation of the Cu-precipitates with respect to the Fe content during the precipitation reaction. The simulation results are compared to experimental data reported in literature. Consistent agreement between experiment and simulation can be achieved with the new methodology.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
2579-2584
DOI
10.4028/www.scientific.net/MSF.638-642.2579
Citation
I. Holzer, E. Kozeschnik, "Simulation of Copper Precipitation in Fe-Cu Alloys", Materials Science Forum, Vols. 638-642, pp. 2579-2584, 2010
Online since
January 2010
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: Jiu Zhou Zhao, Qing Liang Wang
Chapter 1: Materials Behavior
Abstract:Aging of Fe-Cu alloys or steels containing copper may result in the formation of the dispersion of nanometric precipitates in the matrix and,...
164
Authors: I.I. Gorbachev, Vladimir V. Popov, A.Yu. Pasynkov
Chapter X
Abstract:Based on the mean field approximation, a model has been worked out for the description of evolution of carbonitride precipitate ensemble with...
167
Authors: Erwin Povoden-Karadeniz, Ernst Kozeschnik
Chapter 2: Contributed Papers
Abstract:We present successful examples of CALPHAD thermodynamics-based precipitation simulations for three important alloy groups: Single-crystal...
1513
Authors: Lin Qin, Alice Redermeier, Ernst Kozeschnik, Carina Karner, Christoph Dellago
Chapter 2: Contributed Papers
Abstract:In precipitation strengthened ferritic alloys, the Fe-Cu binary system is a well-studied model system. Still, many unsettled questions remain...
1529