Creep Damage and Fracture in Advanced Tungsten Modified 9%Cr Ferritic Steel

Václav Sklenička; Květa Kuchařová; Marie Kvapilová; Petr Král; Jiří Dvořák

doi:10.4028/www.scientific.net/KEM.713.183

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 713Creep Damage and Fracture in Advanced Tungsten...

Creep Damage and Fracture in Advanced Tungsten Modified 9%Cr Ferritic Steel

Abstract:

Advanced tungsten modified 9%Cr ferritic steel (ASTM Grade P92) is a promising material for the next generation of fossil and nuclear power plants. Unfortunately, there are rather few published reports on damage processes in P92 steel during high temperature creep and the effect of damage evolution on the creep strength is not fully understood. In this work, the creep behaviour of P92 steel in as-received condition and after long-term isothermal ageing was investigated at 600 and 650°C using uniaxial tension creep tests. To quantify the effect of each damage process on the loss of creep strength, most of creep tests were followed by microstructural and fractographic investigations. It was found that the large Laves phase particles, which coarsened during creep exposure, served as preferential sites for creep cavity nucleation.

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Periodical:

Key Engineering Materials (Volume 713)

Pages:

183-186

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.713.183

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Online since:

September 2016

Authors:

Václav Sklenička*, Květa Kuchařová, Marie Kvapilová, Petr Král, Jiří Dvořák

Keywords:

Creep, Creep Cavitation, Creep Fracture Mode, Laves Phase, Steel P92

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