Precipitate growth in multi-component systems with stress relaxation by diffusion and creep

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00464143" target="_blank" >RIV/68081723:_____/16:00464143 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.ijplas.2016.03.001" target="_blank" >http://dx.doi.org/10.1016/j.ijplas.2016.03.001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijplas.2016.03.001" target="_blank" >10.1016/j.ijplas.2016.03.001</a>

Result language

angličtina

Original language name

Precipitate growth in multi-component systems with stress relaxation by diffusion and creep

Original language description

The present paper is devoted to the diffusional growth of spherical precipitates having a volumetric misfit. Thus, the matrix exerts a confining pressure on the growing precipitate retarding its growth. Elastic deformation, creep and diffusion are assumed as mechanisms accommodating the misfit of the precipitate in the matrix. Based on the Thermodynamic Extremal Principle, evolution equations for the state variables (e.g. precipitate radius, chemical composition of the precipitate) are derived. The solution of these evolution equations is compared with a number of limiting cases treated in closed analytic form. Results are worked out for model parameters similar to those of a steel with 0.5% C and 2% Cr. The most important result is the evolution of the precipitate radius and its dependence on the creep strength of the matrix. If the material creeps readily, the growth rate is controlled by rapid diffusion of interstitial atoms and is, therefore, high. For a creep resistant matrix, the excess volume of the growing precipitate must be accommodated by the slow diffusion of substitutional atoms away from the precipitate. The precipitate grows correspondingly slower, in the present case by four orders of magnitude. Further results are shown for the confining pressure on the precipitate and for chemical variables.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BJ - Thermodynamics

OECD FORD branch

—

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Plasticity

ISSN

0749-6419

e-ISSN

—

Volume of the periodical

82

Issue of the periodical within the volume

JUL

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

112-126

UT code for WoS article

000378190600007

EID of the result in the Scopus database

2-s2.0-84979462718