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Anomalous ideal tensile strength of ferromagnetic Fe and Fe-rich alloys
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
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2014 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 90, no 2, 024201- p.Article in journal (Refereed) Published
Abstract [en]

Within the same failure mode, iron has the lowest ideal tensile strength among the transition metals crystallizing in the body-centered cubic structure. Here, we demonstrate that this anomalously low strength of Fe originates partly from magnetism and is reflected in unexpected alloying effects in dilute Fe(M) (M = Al, V, Cr, Mn, Co, Ni) binaries. We employ the structural energy difference and the magnetic pressure to disentangle the magnetic effect on the ideal tensile strength from the chemical effect. We find that the investigated solutes strongly alter the magnetic response of the Fe host from the weak towards a stronger ferromagnetic behavior, which is explained based on single-particle band energies.

Place, publisher, year, edition, pages
2014. Vol. 90, no 2, 024201- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-240162DOI: 10.1103/PhysRevB.90.024201ISI: 000345446400001OAI: oai:DiVA.org:uu-240162DiVA: diva2:776580
Available from: 2015-01-07 Created: 2015-01-05 Last updated: 2017-12-05Bibliographically approved

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Johansson, BörjeVitos, Levente

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