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

Result code in 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>
Alternative codes found
RIV/68378271:_____/21:00547734
Result on the web
<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>

Result language
angličtina
Original language name
Thermoactivated dislocation motion in rolled and extruded magnesium: Data of the low-temperature acoustic experiment
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/8J19UA037" target="_blank" >8J19UA037: Non-Schmid behavior of dislocations in magnesium and its alloys</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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