Early Stages of Precipitation in Mould-Cast, Cold-Rolled and Heat-Treated Aluminium Alloy AA7075 with Sc,Zr-Addition

Kód výsledku v IS VaVaI

RIV/00216208:11320/20:10420382 - isvavai.cz

Výsledek na webu

https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=YEfFCnqET0

DOI - Digital Object Identifier

10.12693/APhysPolA.137.250

Jazyk výsledku

angličtina

Název v původním jazyce

Early Stages of Precipitation in Mould-Cast, Cold-Rolled and Heat-Treated Aluminium Alloy AA7075 with Sc,Zr-Addition

Popis výsledku v původním jazyce

Precipitation reactions of the commercial Al-Zn-Mg-Cu(-Sc-Zr) alloy in mould-cast, cold-rolled, and heat-treated states were characterized by electron microscopy, X-ray diffraction, thermal analysis, microhardness testing, and positron annihilation spectroscopy. The distinct changes in microhardness curves as well as in a heat flow of the alloys studied are mainly caused by dissolution of clusters and precipitation of particles from the Al-Zn-Mg-Cu system. An easier diffusion of Zn, Mg, and Cu atoms along dislocations is responsible for the precipitation of Zn,Mg,Cu-containing particles at lower temperatures compared to the mould-cast alloys The mould-cast and cold-rolled alloys contain solute clusters rich in Mg and Zn. Clusters formed in the heat-treated alloys during natural ageing have similar composition but in addition to Mg and Zn contain also Cu. The Cu-concentration increases with increase of period of natural ageing. The mould-cast state after natural ageing contain in addition to solute agglomerates also vacancy clusters formed by agglomeration of thermal vacancies. Addition of Sc and Zr results in a higher hardness above approximate to 270 degrees C due to a strengthening by Al-3(Sc,Zr) particles with a good thermal stability. Sc and Zr have probably no influence on the evolution of solute clusters.

Název v anglickém jazyce

Early Stages of Precipitation in Mould-Cast, Cold-Rolled and Heat-Treated Aluminium Alloy AA7075 with Sc,Zr-Addition

Popis výsledku anglicky

Precipitation reactions of the commercial Al-Zn-Mg-Cu(-Sc-Zr) alloy in mould-cast, cold-rolled, and heat-treated states were characterized by electron microscopy, X-ray diffraction, thermal analysis, microhardness testing, and positron annihilation spectroscopy. The distinct changes in microhardness curves as well as in a heat flow of the alloys studied are mainly caused by dissolution of clusters and precipitation of particles from the Al-Zn-Mg-Cu system. An easier diffusion of Zn, Mg, and Cu atoms along dislocations is responsible for the precipitation of Zn,Mg,Cu-containing particles at lower temperatures compared to the mould-cast alloys The mould-cast and cold-rolled alloys contain solute clusters rich in Mg and Zn. Clusters formed in the heat-treated alloys during natural ageing have similar composition but in addition to Mg and Zn contain also Cu. The Cu-concentration increases with increase of period of natural ageing. The mould-cast state after natural ageing contain in addition to solute agglomerates also vacancy clusters formed by agglomeration of thermal vacancies. Addition of Sc and Zr results in a higher hardness above approximate to 270 degrees C due to a strengthening by Al-3(Sc,Zr) particles with a good thermal stability. Sc and Zr have probably no influence on the evolution of solute clusters.

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

GA17-17139S: Přímý a nepřímý vliv Sc a Zr na raná precipitační stádia v moderních lehkých konstrukčních Al slitinách

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

ACTA PHYSICA POLONICA A [online]

ISSN

1898-794X

e-ISSN

—

Svazek periodika

137

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

5

Strana od-do

250-254

Kód UT WoS článku

000529332100041

EID výsledku v databázi Scopus

2-s2.0-85083814051