Thermoactivated dislocation motion in rolled and extruded magnesium: Data of the low-temperature acoustic experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F21%3A00547734" target="_blank" >RIV/68081723:_____/21:00547734 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/21:00547734

Výsledek na webu

<a href="https://www.mdpi.com/2075-4701/11/10/1647" target="_blank" >https://www.mdpi.com/2075-4701/11/10/1647</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met11101647" target="_blank" >10.3390/met11101647</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermoactivated dislocation motion in rolled and extruded magnesium: Data of the low-temperature acoustic experiment

Popis výsledku v původním jazyce

Acoustic properties (logarithmic decrement and dynamic Young’s modulus) of commercial grade magnesium have been measured in the temperature range 51–310 K. Two types of magnesium samples have been studied: polycrystalline magnesium rolled at room temperature and subjected to hot extrusion. It is shown that the amplitude dependences of the acoustic properties are due to the thermally activated breakaway of dislocations from weak pinning centers. Within the framework of the Indenbom-Chernov theory of thermally activated dislocation hysteresis, the bind-ing energy of the interaction between dislocations and defects was estimated. Furthermore, dependences of the activation energy and activation volume on the applied stress were obtained in the microplastic region. The temperature dependences of the dynamic Young’s modulus are obtained in the amplitude independent region in the temperature range of 51–310 K. Functional form of the Young’s modulus temperature dependences corresponds to the classical concepts of the effect of thermal excitation of electrons and phonons on the elastic properties of crystals. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Název v anglickém jazyce

Thermoactivated dislocation motion in rolled and extruded magnesium: Data of the low-temperature acoustic experiment

Popis výsledku anglicky

Acoustic properties (logarithmic decrement and dynamic Young’s modulus) of commercial grade magnesium have been measured in the temperature range 51–310 K. Two types of magnesium samples have been studied: polycrystalline magnesium rolled at room temperature and subjected to hot extrusion. It is shown that the amplitude dependences of the acoustic properties are due to the thermally activated breakaway of dislocations from weak pinning centers. Within the framework of the Indenbom-Chernov theory of thermally activated dislocation hysteresis, the bind-ing energy of the interaction between dislocations and defects was estimated. Furthermore, dependences of the activation energy and activation volume on the applied stress were obtained in the microplastic region. The temperature dependences of the dynamic Young’s modulus are obtained in the amplitude independent region in the temperature range of 51–310 K. Functional form of the Young’s modulus temperature dependences corresponds to the classical concepts of the effect of thermal excitation of electrons and phonons on the elastic properties of crystals. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/8J19UA037" target="_blank" >8J19UA037: Neschmidovské chování dislokací v hořčíku a jeho slitinách</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Metals

ISSN

2075-4701

e-ISSN

2075-4701

Svazek periodika

11

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

1647

Kód UT WoS článku

000715480400001

EID výsledku v databázi Scopus

2-s2.0-85117081808