Relation between Uniaxial and Equi-Biaxial Creep and Creep Fracture Behaviour in P91 Steel

Karel Milička; Ferdinand Dobeš

doi:10.4028/www.scientific.net/MSF.482.407

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Relation between Uniaxial and Equi-Biaxial Creep and Creep Fracture Behaviour in P91 Steel
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HomeMaterials Science ForumMaterials Science Forum Vol. 482Relation between Uniaxial and Equi-Biaxial Creep...

Relation between Uniaxial and Equi-Biaxial Creep and Creep Fracture Behaviour in P91 Steel

Abstract:

Conventional uniaxial creep tests on massive specimens and small punch creep tests on thin discs were performed on P91 steel at temperatures from 823 to 873 K. The shapes of corresponding time dependences, i. e., creep curves and time dependence of the disc deflection, are very similar. A simple linear relationship between the applied stress in creep tests and the acting force in small punch tests leading to identical times to rupture was empirically derived. The proportionality factor reaches a value close to values observed in other creep-resistant ferritic steels.

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Periodical:

Materials Science Forum (Volume 482)

Pages:

407-0

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.482.407

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Online since:

April 2005

Authors:

Karel Milička, Ferdinand Dobeš

Keywords:

Creep Test, Equi-Biaxial Creep Tests, Small Punch Test , Steel P91

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