High plasticity of an iron aluminide-based material at low temperatures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F18%3A00496640" target="_blank" >RIV/61388998:_____/18:00496640 - isvavai.cz</a>

Alternative codes found

RIV/61389021:_____/18:00496640 RIV/60461373:22310/18:43917052

Result on the web

<a href="http://www.journalrepository.org/media/journals/PSIJ_33/2018/Jun/Sima1822018PSIJ41673.pdf" target="_blank" >http://www.journalrepository.org/media/journals/PSIJ_33/2018/Jun/Sima1822018PSIJ41673.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.9734/PSIJ/2018/41673" target="_blank" >10.9734/PSIJ/2018/41673</a>

Result language

angličtina

Original language name

High plasticity of an iron aluminide-based material at low temperatures

Original language description

Aims: To compare surprisingly high plasticity in compression at low temperature of high-quality compacts prepared by spark plasma sintering from atomized Fe-30.8Al-0.35Zr-0.11B (at%) powder with tensile tests at the same conditions.nStudy design: Compressive tests and tensile tests at room temperature and at 77 K, scanning and transmission electron microscopy, measurements of Young’s and shear moduli data of the sintered material from room temperature to 80 K.nPlace and Duration of Study: Faculty of Mathematics and Physics, Institute of Plasma Physics, Institute of Thermomechanics, Department of Metals and Corrosion Engineering, between October 2015 and November 2017.nMethodology: The feedstock powder was prepared using atomization in argon and consolidated by spark plasma sintering method. The microstructure and phase composition of the sintered samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) with electron backscatter diffraction (EBSD) and by transmission electron microscopy (TEM). Mechanical properties of the feedstock powder were characterized by microhardness data, the compacts were in addition tested in compression and in tension. The elastic properties (Young’s and shear moduli) of the examined material were measured by a combination of two ultrasonic methods: the pulseecho method and the resonant ultrasound spectroscopy.nResults: High plasticity (plastic strain more than 30% without failure) was observed in compressive tests at room temperature and at 77 K. Electron microscopy observations revealed the dominating role of dislocation motion in compression at low temperatures. The ductility measured at tensile tests, on the other hand, was only about 1% with a typical brittle failure.nConclusion: The TEM observations confirm that dislocations enable the plastic flow in compression at low temperatures. The poor ductility in tension is not an intrinsic behavior of the alloy, but it results from the nucleation and opening of nano/microcracks between sintered powder particles and/or cavities in partly hollow atomized particles.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

20501 - Materials engineering

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

Physical Science International Journal

ISSN

2348-0130

e-ISSN

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Volume of the periodical

18

Issue of the periodical within the volume

2

Country of publishing house

IN - INDIA

Number of pages

11

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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