Damage and Fracture Behaviours in Aged Austentic Materials During High-Temperature Slow Strain Rate Testing
2014 (English)Conference paper (Refereed)
Biomass power plants with high efficiency are desired as a renewable energy resource. High efficiency can be obtained by increasing temperature and pressure. An upgrade of the material performance to high temperature material is therefore required in order to meet the increased demands due to the higher temperature and the more corrosive environment. In this study, the material’s high-temperature behaviours of AISI 304 and Alloy617 under slow deformation rate are evaluated using high-temperature long-term aged specimens subjected to slow strain rate tensile testing (SSRT) with strain rates down to 10-6/s at 700°C. Both materials show decreasing stress levels and elongation to fracture when tensile deformed using low strain rate and elevated temperature. At high-temperature and low strain rates cracking in grain boundaries due to larger precipitates formed during deformation is the most common fracture mechanism.
Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2014. Vol. 592-593, 590-593 p.
, Key Engineering Materials, ISSN 1662-9795
High-temperature, ageing, slow strain rate, biomass power plant, austenitic stainless steel, nickel base alloy and dynamic strain ageing
IdentifiersURN: urn:nbn:se:liu:diva-96028DOI: 10.4028/www.scientific.net/KEM.592-593.590ISI: 000336694400133OAI: oai:DiVA.org:liu-96028DiVA: diva2:640393
MSMF7 Materials Structure & Micromechanics of Fracture , July 13, Brno, Czech Republic