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The effect of phosphorus on creep in copper
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Technology.ORCID iD: 0000-0002-8494-3983
2008 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 372, no 1, 66-75 p.Article in journal (Refereed) Published
Abstract [en]

Pure copper with an addition of about 50 ppm phosphorus is the planned material for the outer part of the waste package for spent nuclear fuel in Sweden. Phosphorus is added to improve the creep ductility but it also strongly increases the creep strength. In the present paper the influence of phosphorus on the strength properties of copper is analysed. Using the Labusch-Nabarro model it is demonstrated that 50 ppm has a negligible influence on the yield strength in accordance with observations. For slow moving dislocations, the interaction energy between the P-atoms and the dislocations gives rise to an agglomeration and a locking. The computed break away stresses are in agreement with the difference in creep stress of copper with and without P-additions.

Place, publisher, year, edition, pages
2008. Vol. 372, no 1, 66-75 p.
Keyword [en]
dislocations, diffusion, alloys
URN: urn:nbn:se:kth:diva-17330DOI: 10.1016/j.jnucmat.2007.02.004ISI: 000253259700008ScopusID: 2-s2.0-36549021675OAI: diva2:335374
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Sandström, Rolf
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