Creep behaviour and life assessment of a cast nickel base superalloy MAR-M247

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00508210" target="_blank" >RIV/68081723:_____/19:00508210 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.degruyter.com/downloadpdf/j/htmp.2019.38.issue-2019/htmp-2019-0006/htmp-2019-0006.pdf" target="_blank" >https://www.degruyter.com/downloadpdf/j/htmp.2019.38.issue-2019/htmp-2019-0006/htmp-2019-0006.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/htmp-2019-0006" target="_blank" >10.1515/htmp-2019-0006</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Creep behaviour and life assessment of a cast nickel base superalloy MAR-M247

Popis výsledku v původním jazyce

The cast nickel-base MAR-M247 superalloy has been widely used for high-temperature components. In this work, the creep behaviour of two alternates of MAR-M247 superalloy with different grain size processed at different temperatures of casting are compared. Under the creep testing conditions used in this study, only negligible differences of creep behaviour of the alternate alloys were found and the evaluated creep characteristics correspond to the power-law or dislocation creep. The microstructure of the alloys consists of a gamma matrix with a eutectic, gamma' strengthening cubic precipitates, and M6C and M23C6 carbides. Increasing the temperature induces the dissolution of some M23C6 carbides. Fractures of both variants of alloys exhibit a more ductile character at higher temperatures, while at lower temperature a mixture of brittle and ductile fracture modes was observed, which changes the creep fracture ductility.

Název v anglickém jazyce

Creep behaviour and life assessment of a cast nickel base superalloy MAR-M247

Popis výsledku anglicky

The cast nickel-base MAR-M247 superalloy has been widely used for high-temperature components. In this work, the creep behaviour of two alternates of MAR-M247 superalloy with different grain size processed at different temperatures of casting are compared. Under the creep testing conditions used in this study, only negligible differences of creep behaviour of the alternate alloys were found and the evaluated creep characteristics correspond to the power-law or dislocation creep. The microstructure of the alloys consists of a gamma matrix with a eutectic, gamma' strengthening cubic precipitates, and M6C and M23C6 carbides. Increasing the temperature induces the dissolution of some M23C6 carbides. Fractures of both variants of alloys exhibit a more ductile character at higher temperatures, while at lower temperature a mixture of brittle and ductile fracture modes was observed, which changes the creep fracture ductility.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

High Temperature Materials and Processes

ISSN

0334-6455

e-ISSN

—

Svazek periodika

38

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

590-600

Kód UT WoS článku

000468929500001

EID výsledku v databázi Scopus

2-s2.0-85067555279