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3篇 您的检索式:作者名="NEVASMAA P"
    题名 作者 年代 出处 被引量
1Evolution of the Charpy-V test from a quality control test to a materials evaluation tool for structural integrity assessment 显示文摘WAILLIN K NEVASMAA P PLANMAN T 2002European Structural Integrity Society2002,30,:1
2Effect of weld microstructure on brittle fracture initiation in the thermallyaged boiling water reactor pressure vessel head weld metal显示文摘Effects of the weld microstructure and inclusions on brittle fracture initiation are investigated in a thermally aged ferritic high-nickel weld of a reactor pressure vessel head from a decommissioned nuclear power plant.As-welded and reheated regions mainly consist of acicular and polygonal ferrite,respectively.Fractographic examination of Charpy V-notch impact toughness specimens reveals large inclusions(0.5-2.5μm)at the brittle fracture primary initiation sites.High impact energies were measured for the specimens in which brittle fracture was initiated from a small inclusion or an inclusion away from the V-notch.The density,geometry,and chemical composition of the primary initiation inclusions were investigated.A brittle fracture crack initiates as a microcrack either within the multiphase oxide inclusions or from the debonded interfaces between the uncracked inclusions and weld metal matrix.Primary fracture sites can be determined in all the specimens tested in the lower part of the transition curve at and below the 41-J reference impact toughness energy but not above the mentioned value because of the changes in the fracture mechanism and resulting changes in the fracture appearance.Noora Hytönen Zai-qing Que Pentti Arffman Jari Lydman Pekka Nevasmaa Ulla Ehrnstén Pål Efsing 2021International Journal of Minerals,Metallurgy and Materials2021,28,5:1
3Master Curve Analysis of Inhomogeneous Ferritic Steels 显示文摘Wallin K Nevasmaa P Laukkanen A et' al 2004Engineering Fracture Mechanics2004,71,1617:1
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