Twinning and Precipitation Processes in Hardened and Tempered 54SiCr6 Spring Steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F24%3AN0000015" target="_blank" >RIV/26316919:_____/24:N0000015 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11665-024-10550-2" target="_blank" >https://link.springer.com/article/10.1007/s11665-024-10550-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11665-024-10550-2" target="_blank" >10.1007/s11665-024-10550-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Twinning and Precipitation Processes in Hardened and Tempered 54SiCr6 Spring Steel

Popis výsledku v původním jazyce

Using positron annihilation spectroscopy (PAS), x-ray diffraction (XRD), dilatometry and transmission electron microscopy (TEM) methods, the formation and evolution of the twins, carbides and dislocation density in medium carbon spring steel 54SiCr6 after quenching and subsequent tempering were studied. Combined measurements of positron lifetimes and coincidence Doppler broadening spectroscopy revealed at tempering temperatures of 350 and 400 degrees C; the formation of the Cu-rich defects characterized by single component with positron lifetime tau(2) similar to 130 ps, which is attributed to positron trapped on the defects that, obviously, are not dislocations or vacancies. The relative fraction of screw dislocations assessed using PAS was used to estimate the dislocation density by the modified Williamson-Hall method from XRD data. The change in the average distance between twins with increasing tempering temperature was studied using TEM. The evolution of retained austenite, carbides and cementite was characterized by XRD, TEM and dilatometry. A conclusion was drawn about the nature of defects characterized by a positron lifetime tau(2) similar to 130 ps.

Název v anglickém jazyce

Twinning and Precipitation Processes in Hardened and Tempered 54SiCr6 Spring Steel

Popis výsledku anglicky

Using positron annihilation spectroscopy (PAS), x-ray diffraction (XRD), dilatometry and transmission electron microscopy (TEM) methods, the formation and evolution of the twins, carbides and dislocation density in medium carbon spring steel 54SiCr6 after quenching and subsequent tempering were studied. Combined measurements of positron lifetimes and coincidence Doppler broadening spectroscopy revealed at tempering temperatures of 350 and 400 degrees C; the formation of the Cu-rich defects characterized by single component with positron lifetime tau(2) similar to 130 ps, which is attributed to positron trapped on the defects that, obviously, are not dislocations or vacancies. The relative fraction of screw dislocations assessed using PAS was used to estimate the dislocation density by the modified Williamson-Hall method from XRD data. The change in the average distance between twins with increasing tempering temperature was studied using TEM. The evolution of retained austenite, carbides and cementite was characterized by XRD, TEM and dilatometry. A conclusion was drawn about the nature of defects characterized by a positron lifetime tau(2) similar to 130 ps.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TN02000018" target="_blank" >TN02000018: Národní Centrum Kompetence 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

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

ISSN

1059-9495

e-ISSN

1544-1024

Svazek periodika

neuveden

Číslo periodika v rámci svazku

DEC2024

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

nestránkováno

Kód UT WoS článku

001381676000001

EID výsledku v databázi Scopus

2-s2.0-85212525020