The Influence of Milling and Spark Plasma Sintering on the Microstructure and Properties of the Al7075 Alloy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389465" target="_blank" >RIV/00216208:11320/18:10389465 - isvavai.cz</a>

Alternative codes found

RIV/61389021:_____/18:00489525 RIV/60461373:22310/18:43916893

Result on the web

<a href="https://doi.org/10.3390/ma11040547" target="_blank" >https://doi.org/10.3390/ma11040547</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma11040547" target="_blank" >10.3390/ma11040547</a>

Result language

angličtina

Original language name

The Influence of Milling and Spark Plasma Sintering on the Microstructure and Properties of the Al7075 Alloy

Original language description

The compact samples of an Al7075 alloy were prepared by a combination of gas atomization, high energy milling, and spark plasma sintering. The predominantly cellular morphology observed in gas atomized powder particles was completely changed by mechanical milling. The continuous- like intermetallic phases present along intercellular boundaries were destroyed; nevertheless, a small amount of Mg(Zn,Cu,Al)(2) phase was observed also in the milled powder. Milling resulted in a severe plastic deformation of the material and led to a reduction of grain size from several mu m into the nanocrystalline region. The combination of these microstructural characteristics resulted in abnormally high microhardness values exceeding 300 HV. Consolidation through spark plasma sintering (SPS) resulted in bulk samples with negligible porosity. The heat exposition during SPS led to precipitation of intermetallic phases from the non-equilibrium microstructure of both gas atomized and milled powders. SPS of the milled powder resulted in a recrystallization of the severely deformed structure. An ultra-fine grained structure (grain size close to 500 nm) with grains divided primarily by high-angle boundaries was formed. A simultaneous release of stored deformation energy and an increase in the grain size caused a drop of microhardness to values close to 150 HV. This value was retained even after annealing at 425 degrees C.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

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

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

4

Country of publishing house

CH - SWITZERLAND

Number of pages

18

Pages from-to

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UT code for WoS article

000434710200089

EID of the result in the Scopus database

2-s2.0-85045027816