Microstructure - Fracture toughness relationship in a sub-zero treated 0.9C-7.8Cr sub-ledeburitic tool steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU154901" target="_blank" >RIV/00216305:26210/24:PU154901 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081723:_____/24:00598972

Výsledek na webu

<a href="https://doi.org/10.1016/j.tafmec.2024.104670" target="_blank" >https://doi.org/10.1016/j.tafmec.2024.104670</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tafmec.2024.104670" target="_blank" >10.1016/j.tafmec.2024.104670</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure - Fracture toughness relationship in a sub-zero treated 0.9C-7.8Cr sub-ledeburitic tool steel

Popis výsledku v původním jazyce

The Sleipner steel (0.9C-7.8Cr sub-ledeburitic tool steel) is a widely utilized tool steel currently being adopted to produce tools used in fine blanking, shearing, forming, coining, deep drawing, and others. In these branches, tailoring the final mechanical properties, such as hardness and toughness, to specific application is highly appreciated. The Sleipner steel was subjected to sub-zero treatments (at -140 degrees C for 17 h and 36 h) in the current work. The resulting microstructures, hardness variations, and changes in fracture toughness were analyzed and discussed. It was observed that sub-zero treatments reduced the retained austenite amounts by 14-15 % and slightly refined the martensite. However, the impact of this treatment on carbide count was marginal. The hardness of the sub-zero treated steel increased when tempered at temperatures up to 400 degrees C, but it decreased after tempering at 520 degrees C compared to cryogenically treated specimens. Sub-zero treatment reduced the fracture toughness in the steel tempered up to a temperature of 400 degrees C, but an increment in this property was found after 520 degrees C tempering. Nevertheless, the obtained results indicate that it is impossible to simultaneously enhance both the hardness and fracture toughness of this particular steel grade. Therefore, it is necessary to carefully choose the principal goal of the treatment (either hardness or toughness) even before subjecting the tools to the heat/sub-zero treatment.

Název v anglickém jazyce

Microstructure - Fracture toughness relationship in a sub-zero treated 0.9C-7.8Cr sub-ledeburitic tool steel

Popis výsledku anglicky

The Sleipner steel (0.9C-7.8Cr sub-ledeburitic tool steel) is a widely utilized tool steel currently being adopted to produce tools used in fine blanking, shearing, forming, coining, deep drawing, and others. In these branches, tailoring the final mechanical properties, such as hardness and toughness, to specific application is highly appreciated. The Sleipner steel was subjected to sub-zero treatments (at -140 degrees C for 17 h and 36 h) in the current work. The resulting microstructures, hardness variations, and changes in fracture toughness were analyzed and discussed. It was observed that sub-zero treatments reduced the retained austenite amounts by 14-15 % and slightly refined the martensite. However, the impact of this treatment on carbide count was marginal. The hardness of the sub-zero treated steel increased when tempered at temperatures up to 400 degrees C, but it decreased after tempering at 520 degrees C compared to cryogenically treated specimens. Sub-zero treatment reduced the fracture toughness in the steel tempered up to a temperature of 400 degrees C, but an increment in this property was found after 520 degrees C tempering. Nevertheless, the obtained results indicate that it is impossible to simultaneously enhance both the hardness and fracture toughness of this particular steel grade. Therefore, it is necessary to carefully choose the principal goal of the treatment (either hardness or toughness) even before subjecting the tools to the heat/sub-zero treatment.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/TN02000010" target="_blank" >TN02000010: Národní centrum kompetence Mechatroniky a chytrých technologií pro strojírenství</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Theoretical and Applied Fracture Mechanics

ISSN

0167-8442

e-ISSN

1872-7638

Svazek periodika

134

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

17

Strana od-do

„“-„“

Kód UT WoS článku

001317379800001

EID výsledku v databázi Scopus

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