Early Stages of Precipitation Process in Al-(Mn-)Sc-Zr Alloy Characterized by Positron Annihilation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10316206" target="_blank" >RIV/00216208:11320/15:10316206 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s11661-015-2767-x" target="_blank" >http://dx.doi.org/10.1007/s11661-015-2767-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11661-015-2767-x" target="_blank" >10.1007/s11661-015-2767-x</a>

Result language

angličtina

Original language name

Early Stages of Precipitation Process in Al-(Mn-)Sc-Zr Alloy Characterized by Positron Annihilation

Original language description

Thermal effects on the precipitation stages in as-cast Al-0.70 at. pct Mn-0.15 at. pct Sc-0.05 at. pct Zr alloy were studied. The role of lattice defects was elucidated by positron annihilation spectroscopy (lifetime and coincidence Doppler broadening) enabling investigation of solutes clustering at the atomic scale. This technique has never been used in the Al-Sc- and/or Al-Zr-based alloys so far. Studies by positron annihilation were combined with resistometry, hardness measurements, and microstructure observations. Positrons trapped at defects are preferentially annihilated by Sc electrons. Lifetime of trapped positrons indicates that Sc atoms segregate at dislocations. Maximum fraction of positrons annihilated by Sc electrons occurring at 453 K (180 A degrees C) suggests that clustering of Sc bound with vacancies takes place. It is followed by peak of this fraction at 573 K (300 A degrees C). A rise of the contribution of trapped positrons annihilated by Zr electrons starting at 51

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/GBP108%2F12%2FG043" target="_blank" >GBP108/12/G043: Interface controlled properties of micro/nanocrystalline materials for advanced structural applications, biodegradable implants and hydrogen storage</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

ISSN

1073-5623

e-ISSN

—

Volume of the periodical

46A

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

1556-1564

UT code for WoS article

000350300900017

EID of the result in the Scopus database

2-s2.0-84925485182