2021 Report - SRNL Aging and Lifetimes program tritium aging studies on structural alloys

Abstract

Joe Ronevich of Sandia National Laboratories provided specimens used for tritium pre-charging. He also provided results on hydrogen exposed samples, as well as valuable technical discussion and feedback.

2022 Report - SRNL Aging and Lifetimes program tritium aging studies on structural alloys

“…2.1 Testing of Type 304L Electron Beam Welded Material SRNL-STI-2021-00046 [8] describes the preparation and thermal pre-charging with tritium of EB weld 304L stainless steel specimens. SRNL-STI-2022-00001 [9] presents initial testing at 100 appm nominal helium content. Fracture resistance and tensile tests on 304L stainless steel EB weld specimens were conducted at room temperature in air using a screw-driven testing machine in displacement control while measuring load, crosshead displacement, and extension.…”

“…[8] describes the preparation and thermal pre-charging with tritium of these annealed 21-6-9 stainless steel specimens. SRNL-STI-2022-00001 [9] describes initial testing at lower helium contents. Tensile tests on the annealed 21-6-9 specimens were conducted as described above.…”

“…SRNL's radiological hood with tube specimen (left) and tensile test setup (right) used in testing samples pre-charged with tritium2.2.2 Smooth and Notched 304L Tensile SpecimensSamples of 304L stainless steel in the smooth tensile and notched tensile specimen geometries were supplied by SNL/CA. SRNL-STI-2020-00002[13] documents the tritium precharging of forged 304L tensile specimens (both smooth and notched), and SRNL-STI-2021-00046 and in SRNL-STI-2022-00001[8,9] document details on the first and second rounds of testing at nominally 100 and 300 appm helium. The right panel of Figure2-3 illustrates the test setup of the smooth specimen geometry, and Figure2-4shows the notched specimen.…”