A model for strain hardening, recovery, recrystallization and grain growth with applications to forming processes of nickel base alloys

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00463985" target="_blank" >RIV/68081723:_____/16:00463985 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.msea.2016.04.015" target="_blank" >http://dx.doi.org/10.1016/j.msea.2016.04.015</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2016.04.015" target="_blank" >10.1016/j.msea.2016.04.015</a>

Result language

angličtina

Original language name

A model for strain hardening, recovery, recrystallization and grain growth with applications to forming processes of nickel base alloys

Original language description

An ensemble of n spherical grains is considered, each of which is characterized by its radius r(i) and by a hardening variable a(i). The hardening variable obeys a Chaboche-type evolution equation with dynamic and static recovery. The grain growth law includes the usual contribution of the grain boundary energy, a term for the stored energy associated with the hardening variable, and the Zener pinning force exerted by particles on the migrating grain boundaries. New grains develop by recrystallization in grains whose stored energy density exceeds a critical value. The growth or shrinkage of the particles, which restrain grain boundary migration, obeys a thermodynamic/kinetic evolution equation. This set of first order differential equations for ri, at and the particle radius is integrated numerically. Fictitious model parameters for a virtual nickel base alloy are used to demonstrate the properties and capabilities of the model. For a real nickel alloy, model parameters are adjusted using measured stress-strain curves, as well as recrystallized volume fractions and grain size distributions. Finally the model with adjusted parameters is applied to a forming process with complex temperature-strain rate histories. (C) 2016 Elsevier B.V. All rights reserved.

Czech name

—

Czech description

—

Type

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

CEP classification

BJ - Thermodynamics

OECD FORD branch

—

Project

<a href="/en/project/GA14-24252S" target="_blank" >GA14-24252S: Preparation and Optimization of Creep Resistant Submicron-Structured Composite with Fe-Al Matrix and Al2O3 Particles</a><br>

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

Materials Science and Engineering A-Structural materials

ISSN

0921-5093

e-ISSN

—

Volume of the periodical

665

Issue of the periodical within the volume

MAY

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

175-183

UT code for WoS article

000376788000020

EID of the result in the Scopus database

2-s2.0-84963819676