Paper Title:
Phase-Field Simulation of δ-Ni2Si Precipitation in Cu-Ni-Si Alloys
  Abstract

The phase-field model is established for precipitation transformations in multi-component alloy, which incorporates the interfacial energy and elastic energy anisotropy. The mechanism of the precipitation phase transition is revealed by means of the simulation of δ-phase precipitation process in Cu-4.0at.%Ni-2.0at.%Si alloy, and furthermore, the δ-phase precipitation kinetics is built at the temperature of 450°C. Under the influence of both interfacial energy and elastic energy anisotropy, δ-Ni2Si is presented in disc-shaped precipitates. The simulation patterns show that when one precipitate hits another precipitate with a different orientation, it stops growing, consequently forming a “T”-shape precipitate configuration. When two precipitates with the same orientations grow and hit each other, they connect or coarsen only if the spacing between the precipitates is very small. Therefore, the coarsening behavior of disc-shaped precipitate should be completely different from that of spherical precipitates.

  Info
Periodical
Edited by
Enhou Han, Guanghong Lu and Xiaolin Shu
Pages
184-189
DOI
10.4028/www.scientific.net/MSF.689.184
Citation
Y. Q. Long, P. Liu, Y. Liu, "Phase-Field Simulation of δ-Ni2Si Precipitation in Cu-Ni-Si Alloys", Materials Science Forum, Vol. 689, pp. 184-189, 2011
Online since
June 2011
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