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Damage and Fracture Behaviours in Advanced Heat Resistant Materials During Slow Strain Rate Test at High Temperature
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan. Sandvik Materials Technology, Sandviken, Sweden.
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
2013 (engelsk)Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

As a renewable energy resource, biomass or biomass co-firing in coal-fired power plants with high efficiency are desired which corresponding to elevated temperature and high pressure. An upgrade of the material performance to austenitic stainless steels is therefore required in order to meet the increased demands due to the higher temperature and the more corrosive environment. These materials suffer from creep and fatigue damage during the service. In this study, these behaviours are evaluated using slow strain rate testing (SSRT) with strain rate down to 1*10-6/s at temperature up to 700°C. The influence of temperature and strain rate on strength and ductility in one austenitic stainless steel and one nickel base alloys are investigated. The damage and fracture due to the interaction between moving dislocations and precipitates are studied using electron channelling contrast imaging (ECCI) and electron backscattering diffraction (EBSD). The deformation and damage mechanisms active during SSRT are essentially the same as under creep. The influence of dynamic strain ageing (DSA) phenomena that appears in the tested temperature and strain rate regime is also discussed, DSA is intensified by increased temperature and decreased strain rate.

sted, utgiver, år, opplag, sider
2013. s. 1-10
Emneord [en]
Elevated temperature, slow strain rate, biomass power plant, austenitic stainless steel, nickel base alloy
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-95431OAI: oai:DiVA.org:liu-95431DiVA, id: diva2:635238
Konferanse
13th International Conference on Fracture (ICF13), June 16-21, Beijing, China
Tilgjengelig fra: 2013-07-03 Laget: 2013-07-03 Sist oppdatert: 2015-11-30bibliografisk kontrollert

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