The effect of carbon content and cooling rate on the structure of boron-rich Fe–B–C alloys
The structural and phase composition of boron-rich Fe–В–С alloys in the concentration range of 9.0–16.0 % В, 0.001–1.7 % С, Fe – the balance (in wt. %) was investigated in this work. The cooling rate of the alloys was from 10 to 103 К/s. The methods of quantitative metallographic, X-ray, energy disp...
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Vasyl Stefanyk Precarpathian National University
2020-06-01
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doaj-ed777e3d305e4825b1186c507bbbb5732020-11-25T03:41:20ZengVasyl Stefanyk Precarpathian National UniversityФізика і хімія твердого тіла1729-44282309-85892020-06-0121235536010.15330/pcss.21.2.355-3603011The effect of carbon content and cooling rate on the structure of boron-rich Fe–B–C alloysE. V. Sukhova0Olesj Honchar Dnipro National UniversityThe structural and phase composition of boron-rich Fe–В–С alloys in the concentration range of 9.0–16.0 % В, 0.001–1.7 % С, Fe – the balance (in wt. %) was investigated in this work. The cooling rate of the alloys was from 10 to 103 К/s. The methods of quantitative metallographic, X-ray, energy dispersive X-ray, and differential thermal analyses were applied. It was established that the maximal solubility of carbon in Fe2B hemiboride does not exceed 0.55 %, and that in FeB monoboride – 0.41 %. The alloys that belong to two-phase peritectic (Fe2(B,C)+Fe(B,C)) region, two-phase peritectic-eutectic (Fe2(B,C)+Fe(B,C)) region, and three-phase peritectic-eutectic (Fe2(B,C)+Fe(B,C)+C) region of the Fe–В–С phase diagram were distinguished depending on their structure. The appearance of an eutectic constituents in the investigated alloys was explained by transition of peritectic reaction L+Fe(В,С)®Fe2(В,С) to eutectic reaction L®Fe(В,С)+Fe2(В,С) within the temperature range of 1623–1583 К in the presence of carbon. With cooling rate increasing from 10 to 103 К/s, structural constituents tended to be fine, their volume fraction changed, microhardness and fracture toughness increased.https://journals.pnu.edu.ua/index.php/pcss/article/view/3011structurecooling ratecrystallizationphase transformationsmicrodurometric characteristics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
E. V. Sukhova |
spellingShingle |
E. V. Sukhova The effect of carbon content and cooling rate on the structure of boron-rich Fe–B–C alloys Фізика і хімія твердого тіла structure cooling rate crystallization phase transformations microdurometric characteristics |
author_facet |
E. V. Sukhova |
author_sort |
E. V. Sukhova |
title |
The effect of carbon content and cooling rate on the structure of boron-rich Fe–B–C alloys |
title_short |
The effect of carbon content and cooling rate on the structure of boron-rich Fe–B–C alloys |
title_full |
The effect of carbon content and cooling rate on the structure of boron-rich Fe–B–C alloys |
title_fullStr |
The effect of carbon content and cooling rate on the structure of boron-rich Fe–B–C alloys |
title_full_unstemmed |
The effect of carbon content and cooling rate on the structure of boron-rich Fe–B–C alloys |
title_sort |
effect of carbon content and cooling rate on the structure of boron-rich fe–b–c alloys |
publisher |
Vasyl Stefanyk Precarpathian National University |
series |
Фізика і хімія твердого тіла |
issn |
1729-4428 2309-8589 |
publishDate |
2020-06-01 |
description |
The structural and phase composition of boron-rich Fe–В–С alloys in the concentration range of 9.0–16.0 % В, 0.001–1.7 % С, Fe – the balance (in wt. %) was investigated in this work. The cooling rate of the alloys was from 10 to 103 К/s. The methods of quantitative metallographic, X-ray, energy dispersive X-ray, and differential thermal analyses were applied. It was established that the maximal solubility of carbon in Fe2B hemiboride does not exceed 0.55 %, and that in FeB monoboride – 0.41 %. The alloys that belong to two-phase peritectic (Fe2(B,C)+Fe(B,C)) region, two-phase peritectic-eutectic (Fe2(B,C)+Fe(B,C)) region, and three-phase peritectic-eutectic (Fe2(B,C)+Fe(B,C)+C) region of the Fe–В–С phase diagram were distinguished depending on their structure. The appearance of an eutectic constituents in the investigated alloys was explained by transition of peritectic reaction L+Fe(В,С)®Fe2(В,С) to eutectic reaction L®Fe(В,С)+Fe2(В,С) within the temperature range of 1623–1583 К in the presence of carbon. With cooling rate increasing from 10 to 103 К/s, structural constituents tended to be fine, their volume fraction changed, microhardness and fracture toughness increased. |
topic |
structure cooling rate crystallization phase transformations microdurometric characteristics |
url |
https://journals.pnu.edu.ua/index.php/pcss/article/view/3011 |
work_keys_str_mv |
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