THE INVESTIGATION OF AN Al7075 ALLOY PREPARED BY SPARK PLASMA SINTERING OF MILLED POWDERS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F16%3A00472887" target="_blank" >RIV/61389021:_____/16:00472887 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/16:10335184

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

THE INVESTIGATION OF AN Al7075 ALLOY PREPARED BY SPARK PLASMA SINTERING OF MILLED POWDERS

Original language description

Atomized powder of an Al7075 alloy was high energy ball milled at room and cryogenic temperatures and compacted by spark plasma sintering (SPS) method. The influence of processing parameters on phase composition and microstructure was studied by X-ray diffraction, light and scanning electron microscopy. The mechanical properties were characterized by microhardness measurements. The atomized powder contained a large volume fraction of intermetallic phases located predominantly in continuous layers separating cells or dendrites in the interior of individual powder particles. Consolidation by SPS destroyed partially this morphology and replaced it by individual particles located at boundaries of original powder particles, at cell boundaries or arranged in chains in previous dendritic regions. High energy milling destroyed most intermetallic particles and enriched the matrix by solute atoms. The high deformation energy introduced into the powder during milling enhanced microhardness up to 220 HV. Consolidation of milled powders by SPS led to the formation of very fine-grained structure with the grain size even below 1 μm and with the fraction of high-angle boundaries about 0.9. Two main types of heterogeneously distributed precipitates were found. The irregularly shaped precipitates with a size about 1 μm seemed to encompass areas with rod like nano-precipitates in most samples. A drop in microhardness to 118HV was observed after SPS, predominantly due to a release of introduced deformation energy.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JK - Corrosion and material surfaces

OECD FORD branch

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Project

<a href="/en/project/GA15-15609S" target="_blank" >GA15-15609S: Ultrafine-grained and nanocrystalline metals with high strength prepared by pulsed electric current sintering</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Article name in the collection

METAL 2016 – Conference proceedings: 25th Anniversary International Conference on Metallurgy and Materials

ISBN

978-80-87294-67-3

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

1200-1205

Publisher name

TANGER Ltd., Ostrava

Place of publication

Ostrava

Event location

Brno

Event date

May 25, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000391251200195