Statistical model of deformation localization and softening in polycrystalline precipitation-hardening alloys: Computer simulation View Full Text


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Article Info

DATE

2006-09

AUTHORS

V. A. Kukareko

ABSTRACT

It is shown, using computer simulation of arrangement of particles in a grain of a precipitation-hardening alloy, that a decrease in the grain size of the alloy and in the number of particles in it, as well as the formation of a polydisperse mixture of particles at the stages of their coalescence during aging, substantially increase the manifestation of statistical inhomogeneity in the distribution of precipitates in the matrix and leads to the appearance of interlayers that contain slip planes with a reduced and enhanced density of precipitates. It has been established that in near-boundary regions of grains the scatter in the number of particles that are intersected by various slip planes increase substantially and the probability of appearance of interlayers with a reduced density of particles is greatest. A comparison of the results of simulation with experimental data for typical Ni-Cr and Fe-Ni-Cr precipitation-hardening alloys has been performed. The conclusion is made that the formation of interlayers with a reduced density of precipitates in grains of precipitation-hardening alloys favors deformation localization upon mechanical loading of such alloys and is responsible for the alloy softening at later stages of aging. More... »

PAGES

333-340

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s0031918x06090158

DOI

http://dx.doi.org/10.1134/s0031918x06090158

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1000935191


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