Effect of Aging on Fracture Toughness: Using Digital Image Correlation on DAP and Seabreeze [Slides]

Technical Report · Mon Mar 25 04:00:00 EDT 2013

DOI:https://doi.org/10.2172/1070046· OSTI ID:1070046

Cady, Carl M. ^[1]; Liu, Cheng ^[1]; Lovato, Manuel L. ^[1]

---

1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

The primary reason for this investigation was to determine the most accurate means of measuring the effect of aging in these materials. Initial characterization was pursued to find the most sensitive, repeatable test that would have the least amount of scatter in the test results. Preliminary investigations let to the conclusion that the fracture toughness would likely be the property to show the greatest change in behavior for any intrinsic material property. Test configurations that were initially considered were tensile tests, 3 and 4 point bend tests, Brazil tests, Brazil tests with initial damage and finally a test geometry that is being called a ‘compression- fracture" test. The tensile test will continue to be done because it will be used to generate information about the Poisson's ratio, which can be used in simulations that would verify the test results presented in this report. The bend bar and Brazil test configurations were tried and determined to be unsuitable because they allowed for unstable crack growth in the materials. The result of these investigations on un-pedigreed materials leading to the selection and use of a test geometry that has subsequently been used on pedigreed materials is the focus of this presentation.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1070046
• Report Number(s): LA-UR--13-22105
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE