@article{seok_marple_song_gollapudi_charit_murty_2011, title={High temperature deformation characteristics of Zirlo (TM) tubing via ring-creep and burst tests}, volume={241}, ISSN={["0029-5493"]}, DOI={10.1016/j.nucengdes.2010.04.017}, abstractNote={Abstract Fuel cladding tubing acting as a barrier between coolant and radioactive fuel pellets in light water reactors undergo a combination of mechanical and thermal effects along with corrosive conditions during normal operations as well as accident situations, such as LOCA, etc. Therefore, the mechanical integrity of the cladding tubing is of critical importance. In this study, high temperature deformation characteristics of niobium-containing zirconium alloy cladding materials (Zirlo™) have been evaluated via both ring-creep and burst tests. Creep-rupture data are presented in terms of Larson–Miller parameters (LMP). Data (creep rate vs. stress) from ring-creep and burst tests are analyzed, and operating deformation mechanisms are elucidated. This study demonstrates that the hoop creep data obtained from ring-creep and burst tests are equivalent, and one can be replaced with the other, if needed, in order to evaluate creep life.}, number={3}, journal={NUCLEAR ENGINEERING AND DESIGN}, author={Seok, C. S. and Marple, B. and Song, Y. J. and Gollapudi, S. and Charit, I. and Murty, K. L.}, year={2011}, month={Mar}, pages={599–602} }
 @inproceedings{marple_song_gollapudi_murty_charit_2008, title={Stress rupture characteristics of zirconium alloy cladding under closed-end internal pressurization}, ISBN={9780791848142}, DOI={10.1115/icone16-48006}, abstractNote={An understanding of stress rupture behavior of zirconium alloy cladding tubes is of paramount importance for applications in nuclear reactors. Stress rupture properties of recrystallized Zircaloy-4 alloy were evaluated using burst testing of closed-end thin-walled tubing at varied test temperatures and internal pressures. The rupture data are correlated using the Larson-Miller parameter. The uniform circumferential elongations were also measured from which the hoop creep rates were calculated. These results were fitted to Monkman-Grant relationship with the aim of extrapolating the data to in-service stress levels. Furthermore, the creep data were plotted according to the Dorn equation where a transition in deformation mechanism from ‘power-law’ to ‘power law breakdown’ for Zircaloy-4 was noted. TEM studies corroborated the transition in mechanism from the power-law regime to a power-law breakdown regime.}, booktitle={Proceedings of 16th International Conference on Nuclear Engineering-Volume 1}, publisher={New York, NY: ASME}, author={Marple, B. and Song, Y. J. and Gollapudi, S. and Murty, K. L. and Charit, I.}, year={2008}, pages={385–388} }
 @article{srikant_marple_charit_murty_2007, title={Characterization of stress rupture behavior of cornmercial-purity-Ti via burst testing}, volume={463}, ISSN={["0921-5093"]}, DOI={10.1016/j.msea.2006.06.145}, abstractNote={Abstract An understanding of the stress rupture behavior of Ti alloy tubing is of primary importance for structural applications in energy technology. The stress rupture properties were evaluated using burst testing of closed-end, thin-walled tubing at varied test temperatures and internal pressures. The rupture data are correlated using the Larson–Miller parameter. The uniform hoop strains were also measured along with rupture times from which the strain-rates were calculated. These results were fitted to Monkman–Grant relation with the aim of extrapolating to in-service stress levels. The activation energy for creep deformation was calculated from the Arrhenius equation, and the experimental data were analyzed using Dorn parameters. The analysis indicated a transition from a power-law controlled creep regime to power-law breakdown at high stresses. Transmission electron microscopy studies corroborated the transition in mechanism from power-law region to a power-law breakdown region.}, number={1-2}, journal={MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING}, author={Srikant, G. and Marple, B. and Charit, I. and Murty, K. L.}, year={2007}, month={Aug}, pages={203–207} }