About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components III
|
Presentation Title |
Examining Microstructural Effects on Tensile Properties in Irradiated Inconel 718 using Miniaturized Tensile Specimens |
Author(s) |
Stephen Taller, Caleb Massey |
On-Site Speaker (Planned) |
Stephen Taller |
Abstract Scope |
Ni-based superalloys are a candidate alloy class for high temperature applications because of their intrinsic resistance to creep, adequate resistance to corrosion and high strength gained through secondary phases. High densities of secondary phases and radiation-induced defects enable the use of progressively smaller volumes to provide meaningful quantitative assessments of irradiated material properties. Three heat treatments of superalloy 718, two with distinct mixtures of δ ,γʹ and γʹʹ precipitates, and one completely homogenized, were irradiated in HFIR nominally to 2 DPA at either 300°C or 600°C to provide microstructures with orders of magnitude differences in dislocation obstacle spacing. Uniaxial tensile tests before and after irradiation were performed at room temperature and 300-600°C on subsize SS-J2 specimens, and at room temperature on a relatively new miniature SS-Tiny geometry cut from the SS-J2 specimen head. Comparing mechanical properties and microstructure yielded a guide for miniaturized irradiation specimens. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Mechanical Properties, Environmental Effects |