Creep fracture ductility of cobalt-based superalloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00534028" target="_blank" >RIV/68081723:_____/19:00534028 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-319-91989-8_41" target="_blank" >http://dx.doi.org/10.1007/978-3-319-91989-8_41</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-319-91989-8_41" target="_blank" >10.1007/978-3-319-91989-8_41</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Creep fracture ductility of cobalt-based superalloys

Popis výsledku v původním jazyce

The challenge and demands of environmental protection and energy saving have been more and more serious tasks in some processing technologies of glass industry. Significant effort is being carried out for the development of advanced technology for precision casting of spinner discs for glass industry (glass wool) and high temperature applications up to 1050 °C. In this paper a study creep facture processes of two different cobalt-based superalloys Co Stelit and Co Ursa Stelit was investigated. Constant load uniaxial stress creep tests in tension were carried out at three different testing temperatures of 900 °C, 950 °C and 1000 °C and at the applied stress ranging from 40 to 200 MPa. A mutual comparison of the creep characteristics of the investigated alloys under comparable creep loading conditions shows that the cobalt based superalloy co Stelit exhibits more brittle character of fracture than superalloy Co Ursa Stelit. By contrast, the values of time to fracture (creep life) are longer for the superalloy Co Stelit in comparison to those for superalloy Co Ursa Stelit. The analyses of creep data indicate that creep behaviour of the superalloys under investigation obey both Monkman-Grant and its modified version. The creep fracture modes of these superalloys were determined using empirical formulas based on a continuum damage mechanics approach. The values of damage tolerance factor gamma correspond to mixture of transgranular and intergranular type of fracture of both superalloys.

Název v anglickém jazyce

Creep fracture ductility of cobalt-based superalloys

Popis výsledku anglicky

The challenge and demands of environmental protection and energy saving have been more and more serious tasks in some processing technologies of glass industry. Significant effort is being carried out for the development of advanced technology for precision casting of spinner discs for glass industry (glass wool) and high temperature applications up to 1050 °C. In this paper a study creep facture processes of two different cobalt-based superalloys Co Stelit and Co Ursa Stelit was investigated. Constant load uniaxial stress creep tests in tension were carried out at three different testing temperatures of 900 °C, 950 °C and 1000 °C and at the applied stress ranging from 40 to 200 MPa. A mutual comparison of the creep characteristics of the investigated alloys under comparable creep loading conditions shows that the cobalt based superalloy co Stelit exhibits more brittle character of fracture than superalloy Co Ursa Stelit. By contrast, the values of time to fracture (creep life) are longer for the superalloy Co Stelit in comparison to those for superalloy Co Ursa Stelit. The analyses of creep data indicate that creep behaviour of the superalloys under investigation obey both Monkman-Grant and its modified version. The creep fracture modes of these superalloys were determined using empirical formulas based on a continuum damage mechanics approach. The values of damage tolerance factor gamma correspond to mixture of transgranular and intergranular type of fracture of both superalloys.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/FV10699" target="_blank" >FV10699: Výzkum a vývoj odlitků ze superslitin na bázi niklu a kobaltu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the First International Conference on Theoretical, Applied and Experimental Mechanics

ISBN

978-3-319-91989-8

ISSN

2522-560X

e-ISSN

2522-5618

Počet stran výsledku

6

Strana od-do

184-189

Název nakladatele

Springer Nature

Místo vydání

Cham

Místo konání akce

Paphos

Datum konání akce

17. 6. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000521737400041