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This project seeks to address the challenge of rapid experimental screening of long-term creep behavior of candidate materials by developing an accelerated creep testing (ACT) program for metallic materials using two new ACTs: the stepped isothermal method (SIM) and the stepped isostress method (SSM). These ACTs are capable of recording over a short period of real time, the long-term multistage creep deformation to rupture of materials. Recent experiments on polymers show the remarkable capacity to accelerate creep testing from an equivalent 20 hr to an equivalent 107 hr over the same timeframe.

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Creep-rupture of 9Cr-1Mo tube.
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Principal Investigator
Calvin Stewart
cmstewart@utep.edu
Project Benefits

This project has the potential to reduce the time to implementation of new creep-resistant alloys from decades to months. The ACTs could enable the collection of multistage creep deformation and rupture of extremely long-lived (106 hours) metallic materials in less than 24 hours. The outcome of this study will be an accelerated creep testing program for new material qualification. Original equipment manufacturers and plant owners can then use this knowledge to design and predict the remaining life of fossil energy components with more reliability.

Project ID
FE0030331
Website
University of Texas at El Paso
https://www.utep.edu/