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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Main Author: E. V. Sukhova
Format: Article
Language:English
Published: Vasyl Stefanyk Precarpathian National University 2020-06-01
Series:Фізика і хімія твердого тіла
Subjects:
Online Access:https://journals.pnu.edu.ua/index.php/pcss/article/view/3011
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spelling 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
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