Strain Rate Contribution due to Dynamic Recovery of Ultrafine-Grained Cu–Zr as Evidenced by Load Reductions during Quasi-Stationary Deformation at 0.5 Tm

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00517145" target="_blank" >RIV/68081723:_____/19:00517145 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2075-4701/9/11/1150/htm" target="_blank" >https://www.mdpi.com/2075-4701/9/11/1150/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met9111150" target="_blank" >10.3390/met9111150</a>

Result language

angličtina

Original language name

Strain Rate Contribution due to Dynamic Recovery of Ultrafine-Grained Cu–Zr as Evidenced by Load Reductions during Quasi-Stationary Deformation at 0.5 Tm

Original language description

During quasi-stationary tensile deformation of ultrafine-grained Cu-0.2 mass%Zr at 673 K and a deformation rate of about 10−4 s−1 load changes were performed. Reductions of relative load by more than about 25% initiate anelastic back flow. Subsequently, the creep rate turns positive again and goes through a relative maximum. This is interpreted by a strain rate component ϵ ̇- nassociated with dynamic recovery of dislocations. Back extrapolation indicates that ϵ ̇- contributes the same fraction of (20 ± 10)% to the quasi-stationary strain rate that has been reported for coarse-grained materials with high fraction of low-angle boundaries, this suggests that dynamic recovery of dislocations is generally mediated by boundaries. The influence of anelastic back flow on ϵ ̇- is discussed. Comparison of ϵ ̇- to the quasi-stationary rate points to enhancement of dynamic recovery by internal stresses. Subtraction of ϵ ̇- from the total rate yields the rate component ϵ ̇+ related with generation and storage of dislocations, its activation volume is in the order expected from the classical theory of thermal glide.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Metals

ISSN

2075-4701

e-ISSN

—

Volume of the periodical

9

Issue of the periodical within the volume

11

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

1150

UT code for WoS article

000504411600018

EID of the result in the Scopus database

2-s2.0-85078134846