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Creep properties of phosphorus alloyed oxygen free copper under multiaxial stress state
Swerea KIMAB AB, Stockholm, Sweden..
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0002-8494-3983
Swerea KIMAB AB, Stockholm, Sweden..
2010 (English)In: BALTICA VIII: LIFE MANAGEMENT AND MAINTENANCE FOR POWER PLANTS, VOL 1 / [ed] Auerkari, P Veivo, J, TECHNICAL RESEARCH CENTRE FINLAND , 2010, p. 178-195Conference paper, Published paper (Refereed)
Abstract [en]

Creep tests have been carried out at 75 degrees C using double notch specimens with notch acuities of 0.5, 2, 5, and 18.8, respectively. The creep lifetime for notched specimens is considerably longer than that for the smooth one at a given net section stress, indicating that the investigated Cu-OFP is notch insensitive (notch strengthening). The creep lifetime is notch acuity dependent. The sharper the notch, the longer the creep lifetime is. The creep deformation is to a significant extent concentrated to the region around the notches. Both axial and radial strains on the failed notch are several times larger than those on the unbroken one. Transgranular failure is predominant, independent of stress, rupture time, and notch acuity. To interpret the testing results, finite element computations have been performed using fundamental constitutive equations. The FEM-modelling could represent the creep strain versus time curves for the notched specimens in a satisfactory way. From the FEM-computations a stationary creep stress could be assessed. For a given stationary creep stress, the rupture time can be estimated from the corresponding uniaxial data. This relation can be used to estimate the rupture time for components exposed to creep.

Place, publisher, year, edition, pages
TECHNICAL RESEARCH CENTRE FINLAND , 2010. p. 178-195
Series
VTT Symposia, ISSN 0357-9387 ; 264
National Category
Other Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-242807ISI: 000392900700012ISBN: 978-951-38-7591-6 (print)OAI: oai:DiVA.org:kth-242807DiVA, id: diva2:1290643
Conference
8th Baltica Conference - Life Management and Maintenance for Power Plants, MAY 18-20, 2010, Helsinki, FINLAND
Note

QC 20190221

Available from: 2019-02-21 Created: 2019-02-21 Last updated: 2019-02-21Bibliographically approved

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Sandström, Rolf

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CiteExportLink to record
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