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Damage Mechanisms in Silicon-Molybdenum Cast Irons Subjected to Thermo-mechanical Fatigue
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Scania CV AB, Materials Technology, Södertälje.
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-8304-0221
2017 (English)In: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, Vol. 99, no 2, 258-265 p.Article in journal (Refereed) Published
Abstract [en]

The damage mechanisms active in silicon-molybdenum cast irons, namely EN-GJS-SiMo5-1 and SiMo1000, under thermo-mechanical fatigue and combined thermo-mechanical and high-cycle fatigue conditions have been investigated. The studied load conditions are those experienced at critical locations in exhaust manifolds of heavy-vehicle diesel engines, namely a temperature cycle of 300–750 °C with varied total mechanical and high-cycle fatigue strain ranges. It is established that oxide intrusions are formed in the early life from which macroscopic fatigue cracks are initiated close to the end-of-life. However, when high-cycle fatigue loading is superimposed, small cracks are preferentially initiated at graphite nodules within the bulk. In addition, it is found that both the oxidation growth rate and casting defects located near the surface affect the intrusion growth.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 99, no 2, 258-265 p.
Keyword [en]
Cast iron, Thermo-mechanical fatigue, High-cycle fatigue, Enviromental assisted fatigue, Fatigue crack growth
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-137287DOI: 10.1016/j.ijfatigue.2017.01.014ISI: 000400718300007Scopus ID: 2-s2.0-85017123996OAI: oai:DiVA.org:liu-137287DiVA: diva2:1094546
Note

Funding agencies: Scania CV AB; Swedish Governmental Agency for Innovation Systems [FFI-2012-03625]; Swedish Foundation for Strategic Research [SM12-0014]; Strategic Faculty Grant AFM (SFO-MAT-LiU) at Linkoping University [2009-00971]

Available from: 2017-05-10 Created: 2017-05-10 Last updated: 2017-06-20Bibliographically approved

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The full text will be freely available from 2019-01-10 16:53
Available from 2019-01-10 16:53

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