Hall-Petch strengthening in ultrafine-grained Zn with stabilized boundaries

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43930793" target="_blank" >RIV/60461373:22310/24:43930793 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/24:00602361

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2238785424026607?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2238785424026607?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2024.11.132" target="_blank" >10.1016/j.jmrt.2024.11.132</a>

Result language

angličtina

Original language name

Hall-Petch strengthening in ultrafine-grained Zn with stabilized boundaries

Original language description

A relationship between the tensile yield stress and grain size i.e., Hall-Petch (H-P) law, for an ultrafine-grained (UFG) Zn was experimentally evaluated for the first time. In reality, it is problematic to assess this prediction using experimental results due to the low recrystallization temperature of a pure Zn. In order to do so, three Zn bulk materials with the intercept grain size (d(l)) ranging from 0.6 to 1.1 mu m, stabilized with a small portion of nanoscale ZnO dispersoids positioned at high angle grain boundaries (HAGB), were fabricated from fine pure Zn powders. The material with the finest grain size of 0.6 mu m, ever reported for unalloyed Zn, also exhibited the highest ultimate tensile and 0.2% strain offset yield strengths (YS0.2), ever reported for unalloyed Zn. The strengths were accompanied by a reasonably high ductility. Deformation in the presented materials was attributed to the grain boundary sliding (GBS) mechanism. The experimental data were compared with a theoretical model of the deformation behavior of UFG metals based on GBS through dislocation glide. We confirmed, that the linear H-P relation YS0.2 = 40.8 + 104.8 d(l)(-0.5) remained in force in the range of d(l) = similar to 400-0.6 mu m. A grain refinement softening in UFG region predicted by the theoretical model and other experimental works was avoided. This was attributed to the presence and an effective stabilizing effect of the nano-metric ZnO at HAGB, which impeded GBS. The practical implications of the presented concept of Zn-based bioresorbable material are discussed from the point of view of potential applications in implantology.

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

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

Name of the periodical

Journal of Materials Research and Technology-JMR&amp;T

ISSN

2238-7854

e-ISSN

2214-0697

Volume of the periodical

33

Issue of the periodical within the volume

November

Country of publishing house

ZA - SOUTH AFRICA

Number of pages

11

Pages from-to

7458-7468

UT code for WoS article

001360920000001

EID of the result in the Scopus database

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