10/26/2009 Colloquium - Peter Hosemann
 |
Peter HosemannLos Alamos National Laboratory |
Event Info
Title: Characterization of structural materials for nuclear applications and small scale materials testing on irradiated materials
Date: Oct 26, 2009
Location: 3105 Etcheverry Hall
Time: 4-5pm
Abstract
New advanced nuclear systems aiding in reducing greenhouse gas emissions while producing electricity and addressing the nuclear waste issue can only be realized with the availability of advanced materials. Materials surviving high radiation dose, high temperature and corrosion resistance are needed in order to engineer new and better nuclear systems (fast reactors, fusion reactors, accelerator driven systems, etc.).
In the past it has been shown that ferritic martensitic (F/M) materials are resistant to high dose irradiation without large swelling rates and moderate radiation induced embrittlement. In recent times oxide dispersion strengthened (ODS) alloys have been shown to have better radiation tolerance. There are a very small number of reactor facilities available for high dose irradiation testing. So, new and improved materials testing and characterization techniques are being utilized to study these new alloys under radiation. In this research, ion beam and spallation source irradiations are being used to study materials and their response to radiation. Because of the limited penetration depth of ion beam irradiations and safety limitations new small scale techniques need to be applied.
In this presentation detailed materials characterization of ferritic martensitic steels and ODS steels is shown using advanced techniques such as 3D atom probe, neutron diffraction, small angle neutron scattering, etc as well as small scale testing on irradiated materials. Also a new approach of truly nanoscale mechanical testing of irradiated materials is presented as well as a new idea for radiation tolerant materials.
Speaker Biography
Dipl. Ing. Dr. mont. Peter Hosemann is originally from Vienna Austria. He received his degrees from the Montanuniversität Leoben in Austria. For the last 4 years he has worked at the Los Alamos National Laboratory. Dr. Hosemann's first focus was on corrosion phenomena in liquid Lead-Bismuth Eutectic (LBE) and he designed and built the Irradiation and Corrosion Experiment (ICE) at the Los Alamos Ion Beam Materials Laboratory (IBML). His current research focus is on radiation damage in materials using the IBML facilities and performing post irradiation micro and nanoscale characterization including developing in situ materials testing capabilities. During a recent assignment at the Paul Scherrer Institute (PSI) Dr. Hosemann performed macro, micro and nano-scale materials tests on radioactive materials coming irradiated in the Swiss Spallation Proton source.
