Influence of sintering conditions on compacted rapidly solidified AlfeCrSiTi alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43916650" target="_blank" >RIV/60461373:22310/18:43916650 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.12693/APhysPolA.134.738" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.134.738</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.134.738" target="_blank" >10.12693/APhysPolA.134.738</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of sintering conditions on compacted rapidly solidified AlfeCrSiTi alloys

Popis výsledku v původním jazyce

This work is devoted to the preparation of AlFeCrSiTi alloys by powder metallurgy using melt atomization and spark plasma sintering. Conventional aluminium alloys are characterized by low density but their main problem is thermal stability. The strengthening fine precipitates coarsen at temperature above 300◦C in few minutes, which leads to decrease of mechanical properties. As a solution for this problem, it is suggested to prepare Al–TM (transition metal) alloys by rapid solidification, which leads to presence of big amount of fine Al–TM intermetallics slowing down diffusion and suppressing recrystallization because the Al–TM precipitates are predominantly located at the grain boundaries and triple junction of grains. The rapid solidification process also causes formation of metastable phases, e.g. supersaturated solid solution and quasicrystals. Decomposition of both these phases brings feasibility of self-healing properties to the alloy. Self-healing behaviour of alloy means the ability to close and heal micro- or nanoscaled crack present in material. In case of rapidly solidified alloys, the expected mechanisms are precipitation from supersaturated solid solution or decomposition of quasicrystals accompanied by change of size and shape of intermetallic particles. Microstructure and selected mechanical properties of bulk AlFeCrSiTi alloy were studied by transmission electron microscopy, X-ray diffraction, and compressive testing. © 2018 Polish Academy of Sciences. All Rights Reserved.

Název v anglickém jazyce

Influence of sintering conditions on compacted rapidly solidified AlfeCrSiTi alloys

Popis výsledku anglicky

This work is devoted to the preparation of AlFeCrSiTi alloys by powder metallurgy using melt atomization and spark plasma sintering. Conventional aluminium alloys are characterized by low density but their main problem is thermal stability. The strengthening fine precipitates coarsen at temperature above 300◦C in few minutes, which leads to decrease of mechanical properties. As a solution for this problem, it is suggested to prepare Al–TM (transition metal) alloys by rapid solidification, which leads to presence of big amount of fine Al–TM intermetallics slowing down diffusion and suppressing recrystallization because the Al–TM precipitates are predominantly located at the grain boundaries and triple junction of grains. The rapid solidification process also causes formation of metastable phases, e.g. supersaturated solid solution and quasicrystals. Decomposition of both these phases brings feasibility of self-healing properties to the alloy. Self-healing behaviour of alloy means the ability to close and heal micro- or nanoscaled crack present in material. In case of rapidly solidified alloys, the expected mechanisms are precipitation from supersaturated solid solution or decomposition of quasicrystals accompanied by change of size and shape of intermetallic particles. Microstructure and selected mechanical properties of bulk AlFeCrSiTi alloy were studied by transmission electron microscopy, X-ray diffraction, and compressive testing. © 2018 Polish Academy of Sciences. All Rights Reserved.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GJ17-25618Y" target="_blank" >GJ17-25618Y: Příprava inovativních slitin hliníku se "self-healing" a "self-reporting" vlastnostmi</a><br>

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

Acta Physica Polonica A

ISSN

0587-4246

e-ISSN

—

Svazek periodika

134

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

5

Strana od-do

738-742

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85058979331