Influence of dislocations on precipitation processes in hot-extruded Al-Mn-Sc-Zr alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10388139" target="_blank" >RIV/00216208:11320/18:10388139 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3139/146.111654" target="_blank" >https://doi.org/10.3139/146.111654</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3139/146.111654" target="_blank" >10.3139/146.111654</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of dislocations on precipitation processes in hot-extruded Al-Mn-Sc-Zr alloy

Popis výsledku v původním jazyce

Solute clustering and precipitation processes in hot-extruded Al-Mn-Sc-Zr alloy were studied. Positron annihilation studies were combined with electrical resistometry, microhardness testing and microstructural characterization. Extrusion introduced dislocations which arranged into a cell structure. Sc solutes segregated at dislocations. Moreover, fine coherent Al-3(Sc,Zr) particles precipitated during extrusion and subsequent cooling. During the isochronal annealing Sc agglomerated forming Sc-rich dispersoids. Agglomeration of Sc solutes is facilitated by pipe diffusion along dislocations. Zr atoms become mobile above 240 degrees C and form shells surrounding Al3Sc particles. This process is not affected by dislocations. The maximum fraction of positrons annihilated by Sc and Zr electrons occurred at 300 degrees C, coinciding with hardening of the alloy. The resistivity changes above 300 degrees C are caused by precipitation of Mn-containing particles.

Název v anglickém jazyce

Influence of dislocations on precipitation processes in hot-extruded Al-Mn-Sc-Zr alloy

Popis výsledku anglicky

Solute clustering and precipitation processes in hot-extruded Al-Mn-Sc-Zr alloy were studied. Positron annihilation studies were combined with electrical resistometry, microhardness testing and microstructural characterization. Extrusion introduced dislocations which arranged into a cell structure. Sc solutes segregated at dislocations. Moreover, fine coherent Al-3(Sc,Zr) particles precipitated during extrusion and subsequent cooling. During the isochronal annealing Sc agglomerated forming Sc-rich dispersoids. Agglomeration of Sc solutes is facilitated by pipe diffusion along dislocations. Zr atoms become mobile above 240 degrees C and form shells surrounding Al3Sc particles. This process is not affected by dislocations. The maximum fraction of positrons annihilated by Sc and Zr electrons occurred at 300 degrees C, coinciding with hardening of the alloy. The resistivity changes above 300 degrees C are caused by precipitation of Mn-containing particles.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

International Journal of Materials Research

ISSN

1862-5282

e-ISSN

—

Svazek periodika

109

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

583-592

Kód UT WoS článku

000452546000001

EID výsledku v databázi Scopus

2-s2.0-85052762064