Development of a Mechanistic Understanding of High-Temperature Deformation of Alloy EP-823 for Transmutation Applications: Final Progress Report (September 2003 – August 2004)

摘要

The purpose of this task is to evaluate the tensile properties of three martensitic alloys namely, Alloys EP-823, HT-9 and 422 at temperatures relevant to the transmutation processes. Testing has been performed to evaluate the tensile properties of all three alloys at temperatures ranging from ambient to 600°C. The test materials were thermally-treated (quenched and tempered) prior to the evaluation of their tensile properties. The deformation characteristics of these tensile specimens, upon completion of testing, were evaluated by scanning electron microscopy (SEM). Efforts were also made to identify and characterize defects such as dislocations using transmission electron microscopy (TEM). Additional TEM studies on the tested tensile specimens are being proposed in the near future.