Creep fracture ductility of cobalt-based superalloys

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Creep fracture ductility of cobalt-based superalloys

Original language description

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.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/FV10699" target="_blank" >FV10699: Research and Development of Nickel and Cobalt Based Superalloys Castings</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Article name in the collection

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

Number of pages

6

Pages from-to

184-189

Publisher name

Springer Nature

Place of publication

Cham

Event location

Paphos

Event date

Jun 17, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000521737400041