Phase transformations in novel hot-deformed Al-Zn-Mg-Cu-Si-Mn-Fe (-Sc-Zr) alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422446" target="_blank" >RIV/00216208:11320/20:10422446 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/20:39916167

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=dB8fFkSqpF" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=dB8fFkSqpF</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matdes.2020.108821" target="_blank" >10.1016/j.matdes.2020.108821</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Phase transformations in novel hot-deformed Al-Zn-Mg-Cu-Si-Mn-Fe (-Sc-Zr) alloys

Popis výsledku v původním jazyce

Precipitation stages in the hot-deformed Al-5.28wt.%Zn-3.21wt.%Mg-1.48wt.%Cu-0.24wt.%Si-0.24wt.%Mn-0.14wt.%Fe(-0.23wt.%Sc-0.19wt.%Zr) alloys were investigated. Positron annihilation spectroscopy was employed for a study of vacancy assisted clustering of solutes on the atomic scale, type and concentration of open volume misfit defects and local chemical surroundings of defects. Microhardness testing, thermal analysis and microstructure observations were also used. The alloys contain the eutectic grain boundary phases: T-phase and alpha-Al (Mn,Fe,Si) phase. Positrons are trapped at Zn,Mg-containing Guinier-Preston (GP) zones with no open volume defects and at (precursors of) the T &apos;-phase particles. Above similar to 150 degrees C precipitation of non-eutectic T-phase and coarsening of the S-phase particles are observed. Precipitate-matrix interfaces are characterized by vacancy like misfit defects decorated by Si solutes. Binding energies of vacancies to various solutes (Si, Zn, Cu, Mn, Sc and Zr) obtained by ab-initio calculations were computed. Si solutes exhibit the highest vacancy binding energy among the constituents of the studied alloys. Other solutes (especially Mg, Sc, Zr) repel vacancies. The alloy with Sc,Zr-addition contains incoherent primary Al-3(Sc,Zr)-phase. Layered primary particles with different morphological features such as square and polygonal shapes contain Sc,Zr-rich layers.

Název v anglickém jazyce

Phase transformations in novel hot-deformed Al-Zn-Mg-Cu-Si-Mn-Fe (-Sc-Zr) alloys

Popis výsledku anglicky

Precipitation stages in the hot-deformed Al-5.28wt.%Zn-3.21wt.%Mg-1.48wt.%Cu-0.24wt.%Si-0.24wt.%Mn-0.14wt.%Fe(-0.23wt.%Sc-0.19wt.%Zr) alloys were investigated. Positron annihilation spectroscopy was employed for a study of vacancy assisted clustering of solutes on the atomic scale, type and concentration of open volume misfit defects and local chemical surroundings of defects. Microhardness testing, thermal analysis and microstructure observations were also used. The alloys contain the eutectic grain boundary phases: T-phase and alpha-Al (Mn,Fe,Si) phase. Positrons are trapped at Zn,Mg-containing Guinier-Preston (GP) zones with no open volume defects and at (precursors of) the T &apos;-phase particles. Above similar to 150 degrees C precipitation of non-eutectic T-phase and coarsening of the S-phase particles are observed. Precipitate-matrix interfaces are characterized by vacancy like misfit defects decorated by Si solutes. Binding energies of vacancies to various solutes (Si, Zn, Cu, Mn, Sc and Zr) obtained by ab-initio calculations were computed. Si solutes exhibit the highest vacancy binding energy among the constituents of the studied alloys. Other solutes (especially Mg, Sc, Zr) repel vacancies. The alloy with Sc,Zr-addition contains incoherent primary Al-3(Sc,Zr)-phase. Layered primary particles with different morphological features such as square and polygonal shapes contain Sc,Zr-rich layers.

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/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)

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Materials and Design

ISSN

0264-1275

e-ISSN

—

Svazek periodika

193

Číslo periodika v rámci svazku

193

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

108821

Kód UT WoS článku

000568760100002

EID výsledku v databázi Scopus

2-s2.0-85085842234