The objective of this task is to evaluate the elevated temperature tensile properties of Alloy EP-823, a leading target material for accelerator-driven waste transmutation applications. The test material will be thermally treated prior to evaluation of its tensile properties at temperatures relevant to the transmutation applications. The deformation characteristics of tensile specimens, upon completion of testing, will be evaluated by surface analytical techniques including scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The overall results are expected to provide a mechanistic understanding of high-temperature deformation behavior of Alloy EP-823 as a function of heat treatment.
Highlights of Accomplishment
• Mr. Martin Lewis has joined the Department of Mechanical Engineering (MEG) as a graduate student (M.S.) pursuing his M.S. thesis in the subject research topic. In addition, Mr. John Motaka, an undergraduate MEG student, is also assisting in experimental work.
• An expenditure request form has been prepared and submitted to procure a high-temperature and inert gas chamber with extension rod assembly and system software to perform high-temperature mechanical testing of Alloy EP-823 using an existing MTS machine in the Engineering Building. The approximate cost of this chamber assembly is $47,000.
• Three experimental heats of Alloy EP-823 have been melted. These ingots are currently being processed by hot working to convert them into bars at the vendor’s facility, and will subsequently be shipped to UNLV for thermal treatments and specimen machining
Accelerator-driven systems; Alloy EP-823; Deformations (Mechanics); Metals — Effect of high temperatures on; Nuclear reactors — Materials — Testing; Martensitic stainless steel — Ductility; Strength of materials
Materials Science and Engineering | Metallurgy | Nuclear Engineering | Oil, Gas, and Energy
Roy, A. K.,
Development of a Mechanistic Understanding of High-Temperature Deformation of Alloy EP-823: Task 10, First Quarter Report.
Available at: https://digitalscholarship.unlv.edu/hrc_trp_sciences_materials/79