Characterization of phase development in commercial Al-Zn-Mg(-Mn,Fe) alloy with and without Sc,Zr-addition
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10388103" target="_blank" >RIV/00216208:11320/18:10388103 - isvavai.cz</a>
Výsledek na webu
<a href="https://doi.org/10.4149/km_2018_6_367" target="_blank" >https://doi.org/10.4149/km_2018_6_367</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4149/km_2018_6_367" target="_blank" >10.4149/km_2018_6_367</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Characterization of phase development in commercial Al-Zn-Mg(-Mn,Fe) alloy with and without Sc,Zr-addition
Popis výsledku v původním jazyce
Precipitation reactions of the Al-Zn-Mg(-Mn,Fe)-based alloys with/without Sc,Zr-addition were studied by microhardness and resistivity measurements, and differential scanning calorimetry. Microstructure observation proved the Zn,Mg-containing eutectic phase at grain boundaries. Positron spectroscopy confirmed the presence of Guinier-Preston (GP) zones in the initial state. The changes in resistivity and microhardness curves as well as in heat flow are mainly caused by the formation and/or dissolution of the Guinier-Preston zones and precipitation of the particles from the Al-Zn-Mg system. Formation of the Mn,Fe-containing particles as well as of the eta- and T-phase does not influence hardening significantly. The hardening effect above similar to 300 degrees C reflects the Sc,Zr-addition. Heat treatment at 300 degrees C for 60 min and 460 degrees C for 45 min is insufficient for homogenization of the alloys. The apparent activation energy values were calculated: dissolution of the GP zones (similar to 106 kJ mol(-1)), formation of the metastable eta'-phase (similar to 111 kJ mol(-1)), formation of the stable eta-phase (similar to 126 kJ mol(-1)) and formation of the T-phase (similar to 144 kJ mol(-1)).
Název v anglickém jazyce
Characterization of phase development in commercial Al-Zn-Mg(-Mn,Fe) alloy with and without Sc,Zr-addition
Popis výsledku anglicky
Precipitation reactions of the Al-Zn-Mg(-Mn,Fe)-based alloys with/without Sc,Zr-addition were studied by microhardness and resistivity measurements, and differential scanning calorimetry. Microstructure observation proved the Zn,Mg-containing eutectic phase at grain boundaries. Positron spectroscopy confirmed the presence of Guinier-Preston (GP) zones in the initial state. The changes in resistivity and microhardness curves as well as in heat flow are mainly caused by the formation and/or dissolution of the Guinier-Preston zones and precipitation of the particles from the Al-Zn-Mg system. Formation of the Mn,Fe-containing particles as well as of the eta- and T-phase does not influence hardening significantly. The hardening effect above similar to 300 degrees C reflects the Sc,Zr-addition. Heat treatment at 300 degrees C for 60 min and 460 degrees C for 45 min is insufficient for homogenization of the alloys. The apparent activation energy values were calculated: dissolution of the GP zones (similar to 106 kJ mol(-1)), formation of the metastable eta'-phase (similar to 111 kJ mol(-1)), formation of the stable eta-phase (similar to 126 kJ mol(-1)) and formation of the T-phase (similar to 144 kJ mol(-1)).
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Návaznosti výsledku
Projekt
<a href="/cs/project/GA17-17139S" target="_blank" >GA17-17139S: Přímý a nepřímý vliv Sc a Zr na raná precipitační stádia v moderních lehkých konstrukčních Al slitinách</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Kovové materiály
ISSN
0023-432X
e-ISSN
—
Svazek periodika
56
Číslo periodika v rámci svazku
6
Stát vydavatele periodika
SK - Slovenská republika
Počet stran výsledku
11
Strana od-do
367-377
Kód UT WoS článku
000454568700003
EID výsledku v databázi Scopus
—