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Low Cycle Fatigue Behavior of Sanicro25 Steel at Room and at Elevated Temperature
(Institute of Physics of materials, Academy of Sicences of Czech Republic, Brno)
Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno.
Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno.
Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno.
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2014 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 615, 175-182 p.Article in journal (Refereed) Published
Abstract [en]

Austenitic heat resistant Sanicro 25 steel developed for high temperature applications in power generation industry has been subjected to strain controlled low cycle fatigue tests at ambient and at elevated temperature in a wide interval of strain amplitudes. Fatigue hardening/softening curves, cyclic stress–strain curves and fatigue life curves were evaluated at room temperature and at 700 °C. The internal dislocation structures of the material at room and at elevated temperature were studied using transmission electron microscopy. High resolution surface observations and FIB cuts revealed early damage at room temperature in the form of persistent slip bands and at elevated temperature as oxidized grain boundary cracks. Dislocation arrangement study and surface observations were used to identify the cyclic slip localization and to discuss the fatigue softening/hardening behavior and the temperature dependence of the fatigue life.

Place, publisher, year, edition, pages
Elsevier, 2014. Vol. 615, 175-182 p.
Keyword [en]
Sanicro 25 steel, cyclic plasticity, dislocation structure, fataigue life, effect of temperature
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-123640DOI: 10.1016/j.msea.2014.07.075OAI: oai:DiVA.org:liu-123640DiVA: diva2:890617
Available from: 2016-01-04 Created: 2016-01-04 Last updated: 2016-01-13

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Chai, Guocai
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Engineering MaterialsFaculty of Science & Engineering
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