Origin of localizing creep damage in Ni-based single crystal superalloys pre-strained at room temperature

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00639061" target="_blank" >RIV/68081723:_____/25:00639061 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1359645425007347?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1359645425007347?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2025.121448" target="_blank" >10.1016/j.actamat.2025.121448</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Origin of localizing creep damage in Ni-based single crystal superalloys pre-strained at room temperature

Popis výsledku v původním jazyce

This work investigates mechanisms of irregular microstructure evolution and creep damage localization induced by the prior room-temperature plastic deformation applied to Ni-based single crystal superalloys, AM1 and CMSX-4 Plus, in between solution and aging treatments. Dislocation climb similar to what occurs during the high-temperature low-stress creep is the main mechanism of the microstructure evolution occurring around pre-deformation slip bands, and subsequently leading to the formation of the bands with coarsened gamma/gamma ' microstructure. Presence of ready-to-shear dislocations inside the coarsened gamma ' phase is confirmed by a stereo-pair anaglyphs of scanning transmission electron microscopy. This native dislocation structure before the high-temperature/low-stress creep test is the origin of creep damage localization observed for the pre-deformed specimens. The comparison of two alloys revealed that magnitude of plastic activity (precipitation coarsening and dislocation development) inside the bands with the coarsened microstructure is notably larger for AM1 what consequently explains the creep properties degradation under all creep conditions.

Název v anglickém jazyce

Origin of localizing creep damage in Ni-based single crystal superalloys pre-strained at room temperature

Popis výsledku anglicky

This work investigates mechanisms of irregular microstructure evolution and creep damage localization induced by the prior room-temperature plastic deformation applied to Ni-based single crystal superalloys, AM1 and CMSX-4 Plus, in between solution and aging treatments. Dislocation climb similar to what occurs during the high-temperature low-stress creep is the main mechanism of the microstructure evolution occurring around pre-deformation slip bands, and subsequently leading to the formation of the bands with coarsened gamma/gamma ' microstructure. Presence of ready-to-shear dislocations inside the coarsened gamma ' phase is confirmed by a stereo-pair anaglyphs of scanning transmission electron microscopy. This native dislocation structure before the high-temperature/low-stress creep test is the origin of creep damage localization observed for the pre-deformed specimens. The comparison of two alloys revealed that magnitude of plastic activity (precipitation coarsening and dislocation development) inside the bands with the coarsened microstructure is notably larger for AM1 what consequently explains the creep properties degradation under all creep conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Acta Materialia

ISSN

1359-6454

e-ISSN

1873-2453

Svazek periodika

299

Číslo periodika v rámci svazku

Oct

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

20

Strana od-do

121448

Kód UT WoS článku

001566600000001

EID výsledku v databázi Scopus

2-s2.0-105014113019