STRUCTURE OF RAPIDLY QUENCHED RIBBONS AFTER NATURAL AGING
Alloy solidification at high cooling rates leads to significant changes in structure and phase composition. Conditions appear for a significant extension of solid solubility, grain refining, and formation of metastable phases or amorphous state. Due to this it is possible to obtain unique combinati...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | Russian |
Published: |
Belarusian National Technical University
2015-03-01
|
Series: | Nauka i Tehnika |
Subjects: | |
Online Access: | https://sat.bntu.by/jour/article/view/792 |
id |
doaj-eb94f8416f6a49bdac995d57019e49c5 |
---|---|
record_format |
Article |
spelling |
doaj-eb94f8416f6a49bdac995d57019e49c52021-07-29T08:29:33ZrusBelarusian National Technical UniversityNauka i Tehnika2227-10312414-03922015-03-01011419785STRUCTURE OF RAPIDLY QUENCHED RIBBONS AFTER NATURAL AGINGA. S. Kalinichenko0V. A. Kukareko1V. A. Kalinichenko2Belarusian National Technical UniversityJoint Institute of Mechanical Engineering, National Academy of Sciences of BelarusBelarusian National Technical UniversityAlloy solidification at high cooling rates leads to significant changes in structure and phase composition. Conditions appear for a significant extension of solid solubility, grain refining, and formation of metastable phases or amorphous state. Due to this it is possible to obtain unique combinations of physical, mechanical and other properties in rapidly quenched alloys. Undoubted scientific and practical interest is an application of quenching processes from a liquid state for aluminum alloys with the purpose to improve their physical and mechanical properties.As the structure of such alloys is extremely unstable from a thermodynamic point of view the important issue is to study temporal stability of the microstructure and phase composition of rapidly quenched aluminium alloys of various chemical composition. The paper has investigated an influence of various alloying elements on the structure, phase composition and durometric properties of aluminum foils obtained by liquid aluminum alloy melt-spinning on the disk rotating with various speed. Optical and electron microscopy has been used to study structure and phase composition as well as X-ray structural analysis. It has been shown that alloying of aluminium with copper leads to an increase in micro-hardness up to 130–160 HV0.01, and alloying with chromium and zirconium provides micro-hardness up to 60–80 HV0.01. It has been shown that increasing in amount of alloying additions in the aluminum melt (Al–Cu system alloy) rises the number of CuAl2 precipitates and is accompanied with an increase in micro-hardness of aluminum foils. An increase in cooling rate of the aluminum melt (Al–Cr–Zr system) is accompanied with structure dispersion which increases micro-hardness of the casted foils. The obtained results have made it possible to establish the optimal percentage of alloying elements and the disk rotation speed providing the highest level of aluminium foils’ durometric properties.https://sat.bntu.by/jour/article/view/792aluminum foilalloying elementsrotating diskphase compositionmicro-hardness |
collection |
DOAJ |
language |
Russian |
format |
Article |
sources |
DOAJ |
author |
A. S. Kalinichenko V. A. Kukareko V. A. Kalinichenko |
spellingShingle |
A. S. Kalinichenko V. A. Kukareko V. A. Kalinichenko STRUCTURE OF RAPIDLY QUENCHED RIBBONS AFTER NATURAL AGING Nauka i Tehnika aluminum foil alloying elements rotating disk phase composition micro-hardness |
author_facet |
A. S. Kalinichenko V. A. Kukareko V. A. Kalinichenko |
author_sort |
A. S. Kalinichenko |
title |
STRUCTURE OF RAPIDLY QUENCHED RIBBONS AFTER NATURAL AGING |
title_short |
STRUCTURE OF RAPIDLY QUENCHED RIBBONS AFTER NATURAL AGING |
title_full |
STRUCTURE OF RAPIDLY QUENCHED RIBBONS AFTER NATURAL AGING |
title_fullStr |
STRUCTURE OF RAPIDLY QUENCHED RIBBONS AFTER NATURAL AGING |
title_full_unstemmed |
STRUCTURE OF RAPIDLY QUENCHED RIBBONS AFTER NATURAL AGING |
title_sort |
structure of rapidly quenched ribbons after natural aging |
publisher |
Belarusian National Technical University |
series |
Nauka i Tehnika |
issn |
2227-1031 2414-0392 |
publishDate |
2015-03-01 |
description |
Alloy solidification at high cooling rates leads to significant changes in structure and phase composition. Conditions appear for a significant extension of solid solubility, grain refining, and formation of metastable phases or amorphous state. Due to this it is possible to obtain unique combinations of physical, mechanical and other properties in rapidly quenched alloys. Undoubted scientific and practical interest is an application of quenching processes from a liquid state for aluminum alloys with the purpose to improve their physical and mechanical properties.As the structure of such alloys is extremely unstable from a thermodynamic point of view the important issue is to study temporal stability of the microstructure and phase composition of rapidly quenched aluminium alloys of various chemical composition. The paper has investigated an influence of various alloying elements on the structure, phase composition and durometric properties of aluminum foils obtained by liquid aluminum alloy melt-spinning on the disk rotating with various speed. Optical and electron microscopy has been used to study structure and phase composition as well as X-ray structural analysis. It has been shown that alloying of aluminium with copper leads to an increase in micro-hardness up to 130–160 HV0.01, and alloying with chromium and zirconium provides micro-hardness up to 60–80 HV0.01. It has been shown that increasing in amount of alloying additions in the aluminum melt (Al–Cu system alloy) rises the number of CuAl2 precipitates and is accompanied with an increase in micro-hardness of aluminum foils. An increase in cooling rate of the aluminum melt (Al–Cr–Zr system) is accompanied with structure dispersion which increases micro-hardness of the casted foils. The obtained results have made it possible to establish the optimal percentage of alloying elements and the disk rotation speed providing the highest level of aluminium foils’ durometric properties. |
topic |
aluminum foil alloying elements rotating disk phase composition micro-hardness |
url |
https://sat.bntu.by/jour/article/view/792 |
work_keys_str_mv |
AT askalinichenko structureofrapidlyquenchedribbonsafternaturalaging AT vakukareko structureofrapidlyquenchedribbonsafternaturalaging AT vakalinichenko structureofrapidlyquenchedribbonsafternaturalaging |
_version_ |
1721255594120183808 |