|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||A Comparison of Ring Pull and Axial Tensile Tests of HT-9 and 14YWT Thin-walled Tubes
||Thomas J. Nizolek, James A Valdez, Calvin R Lear, Cheng Liu, Benjamin P Eftink, Tarik A Saleh, Stuart A Maloy
|On-Site Speaker (Planned)
||Thomas J. Nizolek
Mechanical testing of thin-walled tubes and cladding materials is challenging, particularly for activated materials that must be handled in a hot cell environment. While tensile properties along a tube axis are easily determined using miniature dog-bone tensile samples, assessing flow strength and ductility in the hoop stress direction of a short tube is significantly more difficult. Here we develop design criteria and data analysis methods for ring pull tests, comparing ring pull versus axial tensile tests for two candidate fuel cladding materials: HT-9 ferritic/martensitic steel and 14YWT nanostructured ferritic alloy. The impact of geometry-driven bending strains on ring pull tests varies with material ductility, as shown through digital image correlation strain mapping of both alloys. The outlook for determining ultimate tensile strength and elongation to failure using ring pull tests for materials with limited ductility will be discussed.